I think I never laughed harder in any jam game. That screaming when you enter the portal is hilarious! :D
Nevertheless I like the idea, but it's a pretty buggy experience, both 2D and 3D. I recognize a lot of assets from the 3D world (and I think I know which tutorial it was). But considering this was your first participation, and you managed to make both 2D and 3D games, this is very nice work. Well done!