Yeah, thank you! I had the same ideas, but ran out of time. Ctrl+X to remove obstacles, Ctrl+Z to undo the placement, complex, multi-grid blocks to introduce a tetris-like element to the game, control panels to refill ctrls, moving objects, like elevators, cranes, laser gates, patroling and shooting enemies. So many ideas, so little time. Maybe I'll revisit them in the future. Thanks for playing!