This is flagged as linux compatible but it doesn't launch for me. Any suggestions?

I finished the final wave and it just keeps going. Is this a bug or is it an endless survival?

The Mountain is the only level I haven't been able to beat with 10 runes. I'm level 140 so gold is not a problem, but I can't find a proper strategy to deal with so many enemies coming from so many different paths. Has anybody managed to beat it? Any advice?...

I passed all missions, killed Dr. Balanced, where is my achievement for completing all missions? Also, I completed all of them with 7-8 runes on (i.e. all greater than 6), this achievement also locked. I created custom map and this achievement doesn't work either. What's wrong? I want to get all achievements....

Title Unlocked the slime trap, but I don't understand how to equip it.