Happy to hear it!
We are always in search of intriguing mechanics to design and develop around. Unfortunately, the ones we designed about the key spamming situation have not yet been implemented in the game. As for Alpha versions, we hope that that'll be a much lesser issue with the new stuff to be added.
The game is currently using free/paid assets that we do not own as a team. We have received many suggestions about the art including yours. Our talented artist is aware of the situation and replacing the art assets right now; so, it probably will not be a problem anymore in the Alpha versions!
Thanks for playing the game and your comment!