On the two "No more Mr Ice Guy" WR runs (at least one of them on v.0.4.0) the Ice Guy behaves differently than on the current version of the game (seen in the third place videos of kompowiec2 and me). He does not jump again after jumping on the ledges, allowing the player to stay on top of him all the time. As v.0.4.0 won't launch on my (Win 10) PC (due to not recognizing some .dll files), I tried to transfer the old level to the new version, but got no difference in behavior, so I suspect that it's not due to the level data, but the game itself. So my questions are now:

Does anyone know how to get v.0.4.0 to run on Win 10?

I find it weird that these two differently behaving bosses are the same level in the same category. What to do about that?

From the development team I got the advice of building the game myself following this guide: https://github.com/SuperTux/supertux/blob/master/INSTALL.md Sounds fun :-\

I've also had issues with the 0.4.0 version not installing and running properly.

We could remove the 0.4.0 tag for ILs and full game runs (we could have a grandfather rule for RTA times and remove significant IL times for the 0.4.0 specific ILs since it's unfair and pretty much unbeatable if you install newer versions).

lmk what you think.