Unnamed tetris - Prototyp

Controls:
Mouse only, right click to rotate pieces.
There is a "Hold" button to store or switch the current pieces you hold.

This is an early prototype to test out the "hook/loop" and what direction I should take. There is no music or effect and the design is limited. There is no "Lose" and you can pick the same "perk" if you don't want to have several. "First priority" has negative effect as of yet.

What should be the win and lose conditions? 
Get XX amount of score each round and increase?
Get XX% coverage to be able to get to next round?
XX amount of pieces and they are worth XY points?
Anything else?

Meant to be a relaxed game with no time pressure but with each perk and increased round to be little bit more challenging. 

With inspiration from Balatro I would like to have an "ending" but also be able to continue in an endless mode.

Please leave a comment if you like it and what direction you want this to go.