Wolfgang Warsch's Brikks is the third title in Schmidt Spiele's "Klein & Fein" line-up of roll-and-write games that started with Noch mal! from Inka and Markus Brand in 2016 and continued in early 2018 with Warsch's own Ganz schön clever. Like those two titles, Brikks has rules for solitaire play, is suitable for players aged 8 and up, and is labeled as being "especially suitable for two players". I could see an argument being made for that claim, but first let's cover the gameplay:
Each player has three bombs they can spend to blow up a block instead of placing it, but by doing so you give up endgame points.
As soon as you can no longer place a quadromino in your grid, your game is over. Once everyone has filled their grid to the top, tally your points. In addition to the extra points bar and any bombs unused, you score 1-5 points for each horizontal line that contains 8-10 Xs, with these line points doubling, or even quadrupling, as you go higher in the grid. Whoever scores the most points wins!
Ganz schön clever has this same type of symbiosis as in that game sometimes you think you want to take the purple die, but instead you realize that you can take the yellow die to complete a row, which gives you a green bonus, which lets you place a 6 in the next purple box anyway. You're kind of spinning your wheels from one perspective, but all that spinning has boosted your point total, so it's worth the trouble.
With four players, you start with more energy in your reserve to make up for the fact that you'll be the active player only one-quarter of the time, but you'd probably prefer to play with two (as per the box cover) because then you'll be active player half the time, giving you more control (sort of) over which quadrominoes you need to place in your grid. As in Tetris itself, you will probably spend much of your time wishing that a certain brick will drop, only to curse the fates again and again when you have to place something else instead, so keep those bombs handy!