Good job on finishing this! Here are some things that could be fixed: When you click the dimension button, you go to a tiny place but there is nothing to do. There is not even a way to get out of there, so I have to reload the page. So a pause menu would be good. Also the camera movement should be more free, and when you fall its hard to see if there is a platform. The music and the art could also be improved, but with this time limit its totally fine.
Overall well done and with a bit of polishing this could be a fun game! :)