I like the game system. The fun this game provides is substantial enough to make up for its few shortcomings, such as the lack of checkpoints and the absence of an ending. I thoroughly enjoyed exploring every corner of the game once the infinite jump was unlocked.
With more advanced physics, the game would be incredible. Honestly, it's a game that offers maximum enjoyment with minimal of assets.
Keep developing your skills, and you will become an extraordinary game designer.