I think this should have been play tested a bit more before being submitted. The first problem I noticed is that if you click as soon as you start then you hit the top and immediately lose. Then I decided to go to the upgrade menu and I just put everything into flying strength to see what would happen... and now the game is unplayable. Which wouldn't be so bad if you could remove the points from flying strength after you've put them into it but, despite there being a minus button next to it, you can't. The only way to fix this is to close the game and click the "reset" button on the first page, which I think is quite poor design for various reasons. The first of which is I don't think you should have to close the game just to get there, everything should be accessible from any point. Why isn't there a main menu button? And the second reason is, that shouldn't be the only way to fix the game once you've broken it by putting too many points into jump strength.
If you fixed those problems then I think the game would be acceptable, but in it's current state I think it's unacceptable. The problems it has currently are fairly annoying problems that aren't at all difficult to solve. With those few things solved I'd probably bump the rating up to 3/5, but I'm giving it a 2/5 for its current state.