Not sure why, but for me the game acts as if I'm holding left if I'm not holding right. Might be something with unity, since I remember something similar happening in another unity game.
If you click the "LET'S GO!" button while it's still sliding in from the left after the end of a round, that button stops working, as well as the back to menu button (you can still click the upgrades though).
Also, it would be nice to give an option for up arrow as jump, or maybe wasd controls, or maybe even use the mouse: I'd like to be able to use only one hand.
 "JumpingLine"){kind=icon}
 "Stardrops"){kind=icon}
We just added WASD controls in the latest update, so check that out. Thanks for the into on the let's go button, that will help us debug the issue.