Hello,
The game is quite fun to play. A few things you need to consider to make this game appealing and feel good -
1. Polish the controls and keep it user-friendly, currently, the jumping button and shooting button are way too difficult to handle.
2. Polish the Movement Mechanics as currently, the player seems to slide only without having proper user control.
3. play the sound only if the player jumps, not when a player hits the space bar.
4. Change the visuals to something appealing, the background color doesn't suit the game at all.
5. try adding some visual effects and other such things to make the game more dynamic.