Very clearly inspired by 'learn to fly'. There's a lot of things to improve, and imo its best if people tell some of them to you, so don't take this too harshly, you did a great job with your first game! If you're going to start with a ramp, make sure the player can't control the rotation until they're off the ramp, otherwise, the physics will allow the ramp to just not work. Also, feedback is important - if the player buys a glider, put a little glider on their bike. Its ok if its just an art you find online somewhere, as long as you have license to use it! This is a great foundation to work off of, so don't give up!