We expected someone to make it to the end, but we didn't think it would happen so quickly. You're very patient, since you could pull it off in this version of the game! This ending is part of the narrative, but in future versions it will be replaced by something more interesting.
We're going to keep the same game length, but add depth to the gameplay - add more maps, improve the intelligence of the pieces, make multiple characters, and so on. I'm not sure how much it will affect the length, but I think it will increase.
Thanks for the feedback, will be glad if you continue to follow the project!