Nice game
I liked the look of it and the idea behind it. but I couldn't really understand what the items at the shop supposed to do. I tried using them to distract the opponent from pressing the button? but that didn't work hahaha
another suggestion would be to let the player know in some kind of way that the opponent might press the button cause for now its really random and unexpected hehe
maybe add some lines of conversation in between rounds or something.
but nice idea and concept. Good luck :)