I’m pleased that you liked it, thanks for the valuable feedback.
I noticed the issue with the score penalty too, but it was too late to change it since other things still had to be done, but decreasing it in general might be a good idea for a temporary fix.
I was thinking about a queue system that shows you the next X pieces at any given time, but I wanted the player to operate with sets of 5 pieces at once, hence I decided not to give a preview of the pieces that are coming up next. However, I don’t think it would be a bad thing to see the next hand that is coming up, I hope I can find some time on the weekend to put it into the game. But I can give you a little tip: The game uses a so-called “bag system” which is incorporated in many games that deal with Tetris-pieces. What it does, is basically ensuring the equal distribution of the pieces over short periods of time. This game puts every shape into a queue twice, in a random order. When there are less than five pieces left, the game will repeat this. So, you’re guaranteed to see every shape twice, before you see a certain shape for a third time. (I was thinking about creating another section “Pro Tips” in the How to play hints which explains this, but then I completely forgot.)
Regarding the control instructions in-game: Once they’re off, they’ll be gone for the duration of the game. But they re-appear on every new game that is started. But you’re right, maybe this could be turned into a toggleable display.
Your feedback is greatly appreciated.