Hey there!
Love how it looks, and I really like the idea behind it.
But I have some mixed feelings about how the Tetris and tower defense mechanics interact. If I’m focusing on Tetris, I don’t end up with enough towers. If I’m placing towers, I’m not really playing Tetris.
Also, there’s no way to recover if I’ve merged too many rows before nightfall. It feels like there should be buffs or bonuses for merging lines, to make this combination shine. Right now, there’s not much incentive to do it.
That said, I really enjoyed the idea overall. Thanks for the game!