you need to save 2 of them at the 7th one then use it only at the teacher because he can catch up to you extremely quick and your faster up until the 7th code number
the theme was supposed to be in the enemy and item spawns. they do spawn randomly however it's weak to the theme. i wanted to make the game more with the theme but i decided to completely change what direction the game was going to take later on into the jam because i couldn't figure out where to go with our original plan and we got barely anything done for weeks.
