The concept is amazing: Platformer where collecting coins to exit the goal is always exhilarating among gamers. But there are some issues, the game feels empty among the lack of music so try to lighten up our coin collecting with nice background tunes. Also the game area is really large but the potential of the way you could design the levels are being misused on some levels while others (2 & 5) feel like a long shot sometimes. So make it interesting but don't make it impossibly wild. Other than that I'd like to say that the coins is an awesome feature. So why stop at just one coin per level? Go nuts! Make the player want to come back if they didn't get them all. Besides all of this I'd like to say great game and good job on your hard work!