I think it must be a bug in bevy_ascii_terminal. I was able to play/win tracking down the github repo and multiplying by my particular scale factor in convert_world_to_game_tile_pos.
But I'm not sure if I'm comfortable rating given that a link to the repo doesn't seem to have been a part of the submission.
Anyhow, I thought this was a cool little game but found the controls quite unintuitive. I kept mashing "L" when I wanted to build lines, etc. Although I'm struggling to think of a scheme that is obviously better, WASD for item/ability selection seemed to melt my brain a bit.
Great job with the game page.