and what do you mean by the first level is not an easy way to learn the game from? is it just too hard or are the mechanics explained too bad?
The jumps are a little bit hard for a first level. What I'd suggest is to keep the double jump up to the first button but just make the pikes after that a bit easier to get over since it can cause some frustration to die and replay the first level som many times. It teaches the game but it could teach it in a bit easier way.