Even though Milestone 1 has much less scope than the current version, I'd argue that it's the most stable and polished version of SuperTux. Milestone 2 is a bit of a mess development wise and it has so much missed potential if you take a look at the concepts that were made for it around 2006-2008.
@@aminadabbrulle8252 There are no lives in Milestone 2. There used to be a coin checkpoint system where you'd lose 10% of your total coins if you died at a checkpoint and lose your checkpoint if you lost all your coins, but I believe the coin loss was removed.