I like the look, but as others have said, the controls should match the camera perspective.
Also the perspective can be confusing. Maybe you could add shadows under the platforms.
I also really like the character, I look at it as a fish head with legs, lol
I have an issue with the audio, when I start the game, the audio stutters continuously and rapidly. If I mute the tab and then unmute it, it is solved.
Speaking of which, really smooth melody. How did you compose it?
Also how long has it taken you to develop this custom engine? Would you say it was worth it over using an existing engine? Or was it more for the enjoyment of the experience?