Cool game, I liked the levels and the game play.
Some guidance at the beginning would have been helpful, I was talking to all ghosts and wondering what I have to do after I realized that I have to play those levels. The levels itself were pretty nice and I enjoyed playing them. With the music and tricking that red ghost with the portals made a good feeling.
The Ghost moving sound was a bit annoying after some time.
I had no performance or control issues.
One bug I found was that I was able to get the enemy ghost stuck on corners. Sometimes it seems like it “hits” you and everything stands still and after some time you can walk away.