Wow the game is very polished. I like the art style and the twist on typical tower defense games. Each level gets more challenging and it's really well made. Nice job! Although, I wish it fit the theme more, or maybe I missed the liar part.
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Yeah I spent a lot of time polishing the game and improving the pathfinding, as I had quite some difficulty coming up with interesting puzzles. Maybe you noticed the towers returning to a perpendicular angle, if there were no targets. Or how they aim ahead of enemies to account for the movement of the enemies. ;-)
The connection to the theme is the twist on typical tower defence games (puzzle game instead of strategy game). I have to admit that the connection isn't as great as I would have liked. I'm glad to hear that the difficulty curve is on point.