Could have been much better...
The game is too easy in the beginning, and way too hard in the end. None of the upgrades really seem to do much. The clouds should get stronger with each level, but they don't. By the max level, they don't seem top be much faster than the first.
The cloud wall is practically useless even at high levels, and is it barely a help.
Being able to pick up your sister is pointless since you can't jump. All you do is pick her up and run to your death.
The most frustrating thing was that I had to push the "S" and "F" keys at least 5 - 10 times to activate their respective abilities. There are several times I actually died because the lightning ability simply wouldn't work.
I do also agree with the lower review that having a mute and quality button would have been nice. I do like the music, but as the main melody is only about 10 seconds long, it gets old really fast. Especially when the game is that frustrating.
Overall the game could have been much better.