A couple of other nice features I'm working on / have implemented:
- "Overtime" mode. When the time limit runs out, instead of gameplay terminating, you can keep playing - the only catch is that exiters no longer do anything (they just stand there, in front of the exit, frozen), so you can't actually save any more lemmings. This could be useful if you want to see how far you fell short by, or try things out without worrying about the time limit while you're just experimenting. Note, a minor physics change here: While implementing this, I noticed a bug that the game runs for 1 frame more than it should before terminating. The code for this new time limit handling does NOT replicate this bug - it cuts off exactly when it should.
- "Skip to highlit lemming state change". A hotkey that when pressed, jumps forward until the highlit lemming either changes to a new action, or is saved / dies (for the purpose of this, becoming a zombie counts as dying).