I really liked the level loading effect, but I think gameplay and communication of what's happening to the player was lacking. The merging effect would have been nice if you effectively had some different weapon parts or features that'd merge instead of only with numbers.
Pathfinding would have been nice, but moving with WASD might have been even nicer. I liked the bouncy move a lot :D
In any regard, it feels like you worked on what you wanted to work on, and I think with small changes this could be a much nicer experience!