I love the artwork! Sadly I couldn't reach the door in the second level/dimension, maybe I did something wrong
Viewing post in Into the Small Door jam comments
At level 2, you had to first get the wood key and then use it to get the yellow key. After that, you should go back to the spawn point with the yellow key and use the wooden key there. You could go up from there and finally pass the level with the yellow key.
It may be a little long, but I think it's fun to play.!