It's not bad, but it some problems that can be easily corrected: first of all the difficulty doesn't scale, which makes the game boring as time goes on. Second there is no sound (not sure if it's a problem with my browser or not), which also contributes to make the game boring, and finally the font is a times difficult to read. With these 3 improved I think it would be a lot better, and much funnier than how it actually is.
Also yeah, it doesn't adhere to all the restrictions, but that is Jam related, so it doesn't improve the quality of the game to follow them.