Really fun take for a one jump platformer ! And a catchy tune on top of that.
If I may, here's my report :
- jump physics isn't satisfying, you should experiment more to find a sweet spot between precision and speed, feels kinda off at the moment
- your most important sound would've been the bounce effect. Sad there's none (or inaudible).
- putting your 'level end' trigger on the sign post kills the high speed flow a player can achieve. Especially on horizontal levels, where trying to speed up and skip most of the goblins is a fun challenge, you arrive at full speed , hit the end of the screen and... have to backtrack to hit the sign post.
Fun game nonetheless, nice job !