While the limit of 1 simulator per try is a bit harsh IMO (you get unlimited tries in any given level anyways, after all, and some of the levels are basically impossible to get down first try with how precise they are), that's pretty much my only complaint here.
Good difficulty curve, a humorous plot-line, fun gameplay about placing objects out of the way of an object moving in a fixed (and sometimes amusingly odd) path, nice graphics and music, a satisfying conclusion, the game is just the right length where it doesn't overstay its welcome yet doesn't feel like it's potential went under-used... the game even introduces a fun new mechanic part-way through. Oh, and it's a pretty creative use of the "cycles" theme, as an added bonus. Surprisingly polished given the amount of time it was made in, too.
Really good, fun game you have here. I'm just getting started on playing these games and this was certainly a wonderful first impression on the Jam's games.