This is absolutely amazing. I love it!
I've played Super Tux a lot and I've made little game similar to this, but you have done such a wonderful jump here. It really feels just like the original game. I notice you have it labeled as "supertux-classic". Are you going for the feel of the older versions of super tux? I ask because I wouldn't mind helping out a little with this project and maybe add some of the newer features of supertux2 to this game.
Hi metalx! Sorry for the long response. I would love it if we could work together to further develop the game if you wanted.
STC has some long-running optimisation issues. Ever since I developed the level editor the game has become sluggish, especially on mobile devices.
I would also like to port the game to Godot 4, but I haven't had time. Doing this would allow me to fix a number of hacky workarounds I had to implement for the game to work properly, like the object tilemaps and water tilemaps.
As for Milestone 2 features, I never looked into that but it would be fun to add some. Which ones were you thinking?
