A fun, cute game
Well thought out overall, game wise--some levels need thought, some just need good control.
I did notice, though, on the levels where there is not base under the goal, the game would think you died once you reached there even if you had all 3 crystals and it did the "GOAL" animation.
For instance, on the last level, I found that if you walked off the platform, and did the jump when you were right to the left of the lava platform, you could get both crystals and reach the goal. However, it would just repeat the level. In order to win, you had to do the jump right in the right place in the middle of the lava block.
Maybe this is intentional, or maybe it is related to the area of the goal you touch to make it suck you in. On the few levels it did this on, though, I was really sad because it made it seem as if it was discouraging thinking outside the box.