Another small patch to iron out physics glitches and minor issues!
Special thanks to Kuruka, for reporting a physics exploit that was a bit too overpowered to go unnerfed...
Fixes
Glitchy block collisions on Level 17 (Firewalls) for stacked blocks
Focusing (or picking a block without moving it) caused blocks on top of it to slide off
Selecting blocks would sometimes not trigger
Cheese-tutorial in Level 21 (Why?) would sometimes not show, the first time
Various small fixes
Changes
Nerfed an exploit that allowed the player to use a single block to fly