Player needs to unlock more advanced levels/difficulties by earning their way playing lower ones.
Possible idea: 'star' mechanic for each level -- one for completing, one for completing in certain number of moves, one for completing in certain amount of time. Having certain amount of stars unlocks new levels.
Player needs to unlock more advanced levels/difficulties by earning their way playing lower ones. Possible idea: 'star' mechanic for each level -- one for completing, one for completing in certain number of moves, one for completing in certain amount of time. Having certain amount of stars unlocks new levels.