We wanted a higher number of people per level but godots skeleton animation seems to be horribly optimized which led to extremely bad performance with more people. We didnt want the game to be too hard for people playing it so thats why its pretty easy (we were gonna add a harder difficulty but ran out of time :( ). Regarding the tutorial, yeah its not perfect, but as I said we ran out of time unfortunately. Sorry you had a hard time with the upgrade system, we had the same problem with spamclicking by mistake when leveling up when playtesting 😅. Thanks for playing!