As I read the comments, it seems that you won't be working with this game anymore so I'll give feedback in that direction. First of all, unlike other comments, I think the mechanic here is very self explanatory, and I really like the stretchy effect on the snake when I jump. I also appreciate the fact that the hit box of the spikes seem smaller than they look, which allow some room for mistakes - unless I jump almost directly to the spike, I wont lose health. As for the improvement, level design quickly becomes very repeated, probably due to the lack of time. I get that you want to create an infinite game, but leaving the levels looking identical should be avoided. The end screen increasing number every frame is pretty cool, but only for low score. I believe I spent about 10 seconds waiting for all the scores to go up when I got 300+ overall. You can specify a maximum time spent for this, such as increasing from 0 to [score] in 1 second, then the effect appears the same but faster. Last but not least, visual feedback to when you lose health, it it almost the key to having a polished game, and I believe I don't need to elaborate much on this point. Overall, the mechanic in your game reminds me of the jump in Ori, and it is very mobile friendly, you could actually make a mobile game out of this. There are bits and pieces that need work, but this is a good attempt. Keep it up!