Hello guys. I'm the developer of the game.
I just saw this topic. There (hopefully) was a bug where you could instantly lose your key after using it. It SHOULD have 2 uses but some users did report me that it disappeared after one use, which is definitely not intended. I uploaded a new version today morning, please try that version, I really hope that fixes this bug (I couldn't reproduce it no matter how hard I tried it). If anyone still experiences this bug with the new version, please do tell me.
I also want to reflect on those who say this looks really close to Zell's work. Zell's art did inspire me a lot and yes, I'm a beginner in this, but I want to emphasize, that I did not copy and especially did not want to steal his work. I hope this is not the general view of my work, as that would make me kind of sad.
Thanks for playing though and I hope you enjoyed this small teaser. I do try to improve on it in the future.
EDIT: Aaaand I forgot to include the link to the new version... Here it is:
You must be registered to see the links