There are a few problems with this game:
1) Sometimes you'll hit the corner of a block on your way up which gets rid of the block before you even land.
2) If the dialog that asks if you want to look at the walkthrough is supposed to pop up after the next death and you try to reset, the walkthrough comes up automatically.
3)If you hold down jump, you will jump again when you land. It's not really a problem with the game itself but it could get frustrating for people who play platformers that let you jump higher when you hold down the button.