Progress is slow and uninteresting because the upgrades are expensive and unimpactful for the price. I don't know what else to say so I'll leave you with this: Tetris has been remade so many times there are whole resources as to how the game (and it's derivitives) work, if you could be so kind as to read those resources, that'd be nice. Do it for my sake, I'm just some guy on the internet! I'd hate to be the only resource you have to make this game better!

Very promising game, some complaints: 1. the tutorial is unnecicarily long for very basic mechanics, the game should speak for itself beond teaching the controls. 2. I have a very hard time discerning what notes are charted to what intruments, making it hard to stay on beat. 3. the spacebar note is unsatisfying, lacks impact, and is hard to read.