I really like the concept and Presentation. I think you should add some sound and music into the game, It will make its more fun to play. And I feel annoyed after I bought the "Super Speed", which very hard to control. But after all, It still fun to play, Good job.

I agree with the other comment, I couldn't tell that I was purchasing abilities until I read that they had that same confusion and then it clicked. But other than that, very fun! I loved how floaty the main block felt. 

I like the use of the limitation, more creative than what I did with it the size of the game lol 
I would suggest in the store making it clear that I bought something bc I was clicking the item for  a bit wondering why my money was still the same until I closed the store. 

Fun game, I like platformers! :)

fun concept, also what was the point the lines on the left, other than that i would say that you should come up with a better use of the limitation