Just U and I

There will be some cases where you don't wait out the transition and thus can't click on buttons (even though the blue coin comes out). Wait a second and try again, and it should work great.

Try out the B, C, Q, and arrow keys! They may or may not do things in certain scenes! 

It's (just a) UI-based game where you explore, find coins, and then unlock the ending! Bonus points if you get all the blue coins! Don't rush through, since the smooth UI experience is what this project revolves around.