All good man, your criticism is valid I very much appreciate it! Any personal issue I had is seperate from my work, and any good faith criticism is just another opportunity to learn so I genuinely appreciate it!
There are a lot of bugs and the blocks not rotating isn't necessarily a bug but an ooooold implementation of rotation behaving that way (if the blocks collide with borders on rotation, the rotation gets cancelled. Modern tetris deals with this by finding a suitable spot for the rotated tetromino instead of canceling).
Part of why the coin thing doesn't feel very substantial is that there is no score, no win screen or any indication that you are progressing the game other than the game getting more difficult at every reset methinks. Thanks for sharing your experience :D
Thanks for playing, see ya :)