the colour scheme, music and sound effects all fit the art style really well. animations to the main character would add a lot to the game. the level is really cartoon like but could have harder enemies and a more obvious win. there could also be a requirement to finish the level, for example, the player needs to collecta all the coins, or collect a minimum.
overall, i love the artstyle and audio, the game could use some animations and other tasks for the player to complete.