I think there's a bug because after level 1, zqsd stopped working and it reverted to awsd. Either ways, this is a very cool game !
Oh a fellow zqsd user ! Alright I'll check it out.
I don't seem to get the same bug as you do and I don't really know what's closing it on your side. I'll dig a bit deeper after the voting. Anyway thank you for the report and I'm glad you enjoyed the game :)