For these types of games (you know the ones that have a multiplayer goal but the individual game loop stripped down to its mechanics wouldn't be fun if it wasn't for everything else; there was a Discord community dragon defeating one a while ago for example), the only way to really increase enjoyment is to make it look cool and show progress, and you did both of those really well. The music for some reason fits, and the wonderful stats screen gives another reason for people to remember your game.
Oh and the intentional lack of permanent upgrades was a good choice as well but that's expected.