Very good job. I love so much this type of game. Sooo nice art. Good Job. I have made a plateformer too, and i think you idea to add a time limitation to finish the level is very good.
Thank you for reply (again)!) The movement and all mechanics in platformers are very difficult and interesting despite all first impressions.
Yes, i completly agree with you. make a platformer is difficult because the game feel is very important in this type of game.