I have most of that stuff fixed now, except for the timers and introduction. The timers: I'm not sure if players can finish them within 100 seconds, as the standard levels don't have them. Introduction: I'm not sure what's the best way to fix the introduction level, so I may need help on that.
I'm more likely to upload the latest version of the levels when I finish editing them again, and if needed, contact the original author to see if relicensing is possible.
This is the error I get when I start the original levelset, although it will not appear again when the levelset is started again, because the intro level is not launched afterwards:
- {l Code}: {l Select All Code}
[FATAL] /build/supertux-W6aC2p/supertux-0.3.5~git20150728+4~ubuntu14.04.1/src/supertux/main.cpp:443 Unexpected exception: Squirrel error: Couldn't unset worldmap in roottable (the index 'worldmap' does not exist)
UPDATE: I now have sent an e-mail to the original author. All that needs to happen is to see what he will reply back to me with. If he does reply, I'll put my conversation with him here. Else not, what is there that I can do if I don't get a response anytime soon, within the next 5 months?