5 Seconds is a long time :D Felt like it snowballed at times but I had fun nonetheless =D
Really nice for a first game jam, particularly love the little audio melody. I'd recommend some faster character controls (maybe with acceleration / deceleration) and if you want jump height variance try out some typical methods of doing this (Double Jump, or hold jump to go higher) - shift just felt unintuitive.
Other than that really nice ^^ Glad you had fun, hope you continue to do jams ^^