Thanks! We definitely wanted to blend the concepts of both puzzle & platformer, although certain levels lean one way or the other.
13-16 are definitely a challenge. Calling out @Tacaro (who made level 14) ragequit the first time he tried it on browser hahahaha. We actually discussed briefly having a split between main levels and 'dev levels' for the extra challenge or a slower ramp up but didn't have time to make enough levels.