This is an interesting game with a good gameplay mechanic. The ability to switch the world's shape and find item to reach new places is a reliable gameplay that is always enjoyable to play.
I also liked the Undertale-type of combat system.
About the graphics, it's a decent pixel arts look, tho I had a big issue with the effects of entering the water or the gas which make the game very unpleasant to navigate as it led me to having a headache.
The audio is repetitive but not annoying so I'm fine with it.
The other problem were the controls. Q & S should also give the ability to turn around. And the E key doesn't seem to always respond and require to type it several times to grab an item.
In conclusion, some improvement with the controls and more than all, the HUD, and the game might become fully enjoyable! ;)