The mechanic seems interesting and it's executed pretty well. Though I did have a decent amount of frustration with some areas, and the unforgiving amount of checkpoints. That and the sometimes hard to distinguish hitboxes on the obstacles. There were quite a few times I seemed to jump over a cactus(?) and still hit it, which got kinda annoying. Plus the fact that you're stuck at the whim of the game in terms of the light going on and off led to a lot of sitting and waiting until it either came on or turned off. Though there were bits that allowed me to do bits of each in the opposite, there were also areas that very clearly needed one or the other.