Solid little game and a good music selection. I did have some initial problems at the start understanding the game. I think the instructions could be improved for us dumb people who try to overcomplicate things. I think I could leave the button light on until the next round, I was mashing the button multiple times at first (my fault for not reading instructions in the first place).
I think, as others have mentioned, a countdown clock would be helpful, is there any progression? i.e. does the time between rounds reduce?
Like the game page background design.
Overall I enjoyed the game.