While I understand that, the controls in my opinion do need re-working somehow that would fit with your game's needs yet still provide the player more hints / knowledge about where they're placing their tiles / triomino. I do however really enjoy the game, good job.
Thank you, I appreciate the input.
In addition to the reasons mentioned, the challenge of mentally figuring out the placement of the tiles should be viewed as "brain training" of sorts. After a little while it comes naturally. Honestly, I wouldn't want to change the mechanics even if I could.
Cheers.