How to pass every level with 25 lives remaining at the end of the game. Some levels are tricky, but all the information you need to know is here. If you want to play this game, you can play it here on Kongregate:
http://www.kongregate.com/games/ArmorGames/seppukuties
Please take note. You can beat each level twice. The first time, get all the acorns, but don’t care about how many times you die. The second time, forget about the acorns and just finish the level with as few lives as possible. Both scores are recorded separately. You need to complete every level losing no lives except for 1-3, 1-4, 2-2, 3-3, and 5-2. Full instructions are here.
1-1: Easy enough. There’s no way to die on this level.
1-2: Push the bottom square almost all the way to the right. If you push it all the way, it will cause the big block to fall and crush you. There should be no crack of daylight showing between the small block and the earth on the right. Climb back on top and jump onto the top ledge, which hasn’t fallen yet. Hold the right button after you jump and keep tapping the up key. Either you will jump on top, or you will cause it to fall (and thus make it easy to get on top).
1-3: Get the green key, then head back to the bottom. Grab all six acorns. Finally, stand to the left of the red key, jump and push left, getting the red key and going as far to the left as possible before dying. This death is unavoidable, but your corpse should be far enough to the left that you can jump on it with the next animal. Stand as far to the left on the corpse as possible without falling off. It will begin sliding to the right. Keep doing this (for a couple minutes) until the corpse is far enough to the right that you can just jump to the end.
1-4: Get the blue key and die. This death is unavoidable. Jump on the swinging ball to get the acorns. Only then, get the red key and finish the level.
2-1: Jump into the carrier and push it to the right by running up against the right lip. As soon as the ball falls, and the carrier falls into the lava, jump and land on the right lip of the carrier. It is high enough that you won’t get burned. Jump to the right. As soon as you grab the green key, run to the left (the green platform will extend) and jump onto the right lip of the carrier. Remember to get the three acorns on the top right before you get the red key!
2-2: Get the red key and sacrifice a life. This is required. Get the green key and jump out before it falls. You have to jump on top of the piece that falls and hit SHIFT to commit suicide to jump on the corpse to get all the acorns. The second time you do the level, don’t do that because you don’t need to get the acorns to finish the level. Jump up on the carrier and it will go right, hit the blue key, and it will fall. Grab it, and finish the level.
2-3: Grab the red key and then jump to the middle platform. None of the spikey balls land there. Wait until they all clear out, then head to the end.
2-4: Jump on the ledges up to the top and get the red key. Fall back down onto the green ledge. Once the green key gets bumped out, grab it and immediately run left and jump. You will have a split second to do this as the green ledge is moving. It’s actually pretty easy. Climb back up to the top and fall down the right to finish.
3-1: Get the green key. Climb up to the top and jump over the wooden stairs. To do this, jump, hold left, and continue trying to hit the jump button. You will get it eventually. Get the blue key first, then push the wooden ball to the left into the slot. The wooden stairs will fall to the bottom. Climb up on them and get the red key. Then head to the end.
3-2: Ignore the red key – you don’t need it. Stand on the edge of the ledge overlooking the lava, jump to the right of the ledge above and push the block enough to the right that you can land next to it on the ledge. Don’t push it any further. Jump on this block to the top and push the big block to the right. The other block will swing down. You may have to jump down and stand on this block a bit to keep it aligned as it passes through the opening and pushes the other block into the lava. Then, continue pushing the top block to the right. When the blocks fall, jump on them one after another to the acorn.
3-3: Get the green key. Immediately run to the left far enough to be clear of the spikes and jump as high as you can. Try to land on one of the boulders solidly enough to jump again. This is very tricky and may take several attempts. Once you have that, push the block on the right just enough so that it falls to the right and leans against the wall. Jump on it and grab the red key. Go to the far left and sacrifice one life falling straight onto the spikes. Jump down onto that corpse safely, and then to the right.
3-4: Grab the red key and run. Head to the green key and get it as fast as you can. Then head to the end. This is all about speed.
4-1: This is about timing and patience. Grab the red key, then go back and grab the green key, then head to the end.
4-2: All of the keys must fall into the cart. Try it a few times. Grab the green key, then the red key, then the yellow key, then the blue key. Then go collect the keys in the cart.
4-3: Get the red key and jump out of the pit before the boulder lands on you. Jump up on the green ledge and push the wood all the way left. Jump on the wood to get the acorns. Get the green key and the piece will fall in the lava making a ledge to get the final acorns. Then go to the end.
4-4: Get the red key and then push the ship to the right by pushing against the ledge on the bow of the ship. When you get the blue key, jump to the end.
5-1: Get the red key in the upper-right. Collect all the acorns. Then get the red key in the upper-left. Stand on the small platform in front of the green key just to the left of the boulders. Run to the right, jump at the last second and immediately hold left. You will get the green key and land on the same platform. Then, jump across and finish.
5-2: Sacrifice a life in the spikes so that the corpse fills the hole. There have been reports of people finishing this level without dying. Maybe it’s just luck, but you don’t need it. The cart always gets stuck for me if I don’t sacrifice a life in the pit. Then climb up to the top and get the red key. Ride the cart to the end and jump up and to the end.
5-3: Jump up and tap the left side of the ledge with all the keys. Then jump onto the second square platform and stand on the left side of it as far as you can. The keys should all land on you. Then go back and get the purple key and head to the end.
5-4: This is about timing. As soon as the spikey ball hits the tall piece, get the first red key. This should start the second ball moving. Wait. When you see the ball on the upper right start moving, get the second key. Wait some more. When the tiny ball at the top falls, get the third key. Stand next to the opening and wait for the balls to fall. Climb up and out, to the left and up to the end.
5-5: This is tricky, but you must lose no lives. Get the blue key. Then, try to maneuver the big wooden plank so that it is rotating slowly clockwise. Stand all the way to the left of the pit without hitting the spikes. When the wooden plank is just past vertical, jump on top of it and jump again, landing to the right more to help stabilize it. Then jump to the right and down and to the end.