wow, what a fun idea! its really difficult to use after 4-5 shots though. I think just a bit slower scaling would be nice. Also I tried speedrunning levels, and it didn't recognize me touching the final door. Did I miss anything? Good job overall!
Thanks! I added it right at the end so couldn't get anything in to communicate it but you can only enter the final door if you clear a certain number of enemies, it's 7 for levels 2 & 3 and all enemies for level 1