Overall I enjoyed this game, even if it can be very challenging. Short, but its meant to be replayable as a speedgame, of sorts. I do not regret purchase.
W.r.t. stability issues: I dont remember experiencing any crashes. There was one surefire way to make it freeze, but most wouldnt find that anyways.
(for the curious, the freeze involves gaining the ability to go back to previous areas, and then using said ability to "pwn" one of the early-game areas with your late-game strength. It will lock up between stages, when you have four active modifiers and it attempts to add a fifth. Kinda sad, but not gamebreaking by any means...)
The J-Bear about You Must Build A Boat, v1.0.1617