Cute little game! I would recommend 2 things for your further development. Add some sort of a n indicator for how far in the level you are. Especially when you have vertical movement you can very easily feel like you don't know if you are going in the right direction as the player. Secondly, try to add some sort of indicators when jumping down is safe and when it is not. On the first screen for example, you die if you don't make the jump, however on the second one you don't. This is inconsistent and messes with the logic model you just learn from the first screen. So either try to be consistent or try to make some sort of indication that you can indeed (not) jump down.