Thanks a lot for playing and the great feedback! :) Interesting to hear your view on the number of mechanics - I personally love having as many weird mechanics as possible to keep things fresh, but I totally see your perspective. We’re working on spacing the mechanics out better and letting them breathe more and will consider relying a bit less on the additional win conditions. Maybe we can consider saving them for later levels.
I just pushed a small update which should fix both the one-way portal and the victory animation bugs.
Regarding the victory animation bug: are you sure you encountered it in multiple levels? The bug was caused by a miss-placed tile map layer in the boxes level but aside from a very small offset in the Scorpio level I couldn’t find this error in any other level.