This is something I see a lot of - UI's are built for 1 specific resolution and do not properly orient or scale based on the screen they are played on. Recommend always checking that before you get too far into your UI building.
On to the game - fun idea, but tricky to play. I'm not sure how many jumps I was supposed to have but I kept being able to get more than 2? Also I did not like that my horizontal movement was halted after a jump, would be nice to decouple those 2 movement speeds.