Loading a long game means reproducing 500k+ frames at the rate of approx 50 per second, until it starts lagging and finally freezes half way through... This happens when game is exited and picked up some time later. It makes playing long 200+ waves games pointless unless it's played with no breaks. Can't this be changed, like it's done in almost all other games, where you pick up where you left off? It really is frustrating and it's wasting my time.