An excellent new take on Tetris! At first I was sceptical of how well it would work, but having played it, it really does work! There's plenty of strategy and skill to be learnt, which makes it all the more addictive. The idea of power-ups is also very cool
My only critique would be the music... The spin SFX is alright, but I personally found the clicks and booms of the music, and the beeps in the shop a little annoying. That said, kudos to you for giving it a go and making it all yourself! I also appreciate you including granular settings, so I could disable it!!
Oh and the credit cheat was great! Often when reviewing I'm torn between wanting to fully experience every part of the game, but not wanting to spend ages trying to complete it. So I really appreciated the option to quickly enable everything for testing :D
Good work!