Really liked playing this one! I enjoyed the smart level design with the ghost mechanics, really nicely done. The art was very fitting, nice and simple, and the music was nice as well, although I found it getting repetitive around level 4.
I think the pacing was really great. The only main problem I encountered is that there's no visual indicator for the range of the bouncers, which makes it frustrating because, sometimes when I think I'm in range, I press space, but then I can't jump and fall to the floor (or into spikes in the case of level 10). Combined with their animation of shrinking and growing, it becomes even more confusing and frustrating. An easy way to fix this would be to add a simple circle around the bouncers, showing when I can and can't interact with them, and I think that would make them a lot more fun to use, especially in level 10, which is all about timing those jumps.
Also, I'm not really sure if this is a real issue or just a common problem in ghost player games, but I could basically wait around in the corner for like 20 seconds and then continue, which made my ghosts much easier to deal with. Again, not sure if there's a way to fix that or if it's just a design quirk. It didn’t really hurt the gameplay, it just made it a bit easier for me.
Great job with this game! I really enjoyed playing it.