Thanks a lot for the feedback! The spikes are difficult to see because of how fast the levels are going, if I had the chance I would have made some more levels in the beginning which are a bit slower so you could build up to the faster spikes later on. And with the ceiling thing on the third level I decided to leave it in because it could be used as a short cut for those who know it's there, like b-hopping in valve games which is actually a glitch in their engine, but they keep it in their games anyway because it's a fun way to get around for those who know how to do it.