Nice concept on paper, but it needs an extra twist, because it's just pressing D simulator, the
game also got glitched and softlocked (sorry for being harsh, kai, but I’m sure
your next game will be better :>)
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It is not much of an twist, but the tetris mechanics sets in for the columns and leaves you less and less tiles that you can put on top of each other before they collapse again.
If you don’t mind, maybe check the install version. So far I only got bug reports for the Web version. I still can not reproduce it, though, it drives me crazy!