Very addictive, as any pachinko game.

However, my main gripe is that the progress is very very slow, it's a game artificially stretched to be played for several hours on a second monitor (and probably even days if you want to complete it). I'm not against it, it's a decision by the dev, but I felt like I was grinding for like 10 rounds to get a tiny upgrade that reduces the ball spawn time by 0.025/s which is almost meaningless and will probably have no effect whatsoever since maybe the timer will run out before I can squeeze an extra ball with that tiny upgrade. The upgrades are very tiny, the game is A LOT of grind.

If this game could be completed in an afternoon I'd say it's ok, but so much grinding for a pachinko game is not worth the time in my opinion because ultimately all the content can be unlocked in an hour of gameplay, the rest is just prestige to get other tiny buffs on the content you've already unlocked, there's practically no more content, just more of the same with new tiny and increasingly expensive buffs.

There are other issues, for instance it's not thematic, the UI is super simplistic, it doesn't even have a colorful background that changes with the different levels (so at least you'll "feel" a bit of progress even if it's just a background image) it lacks all the colors, the randomness and flashing lights of real pachinko machines, it's a plain back background with circles bounching accross the screen. So even as a pachinko game, it's not doing a good job.

I can't say I'd recommend it or not, It depends on the player. Some people won't grind for hours and hours on a game about bouncing balls and destroying balls, but clearly other people will since there's a huge market in Japan, so it's finally up to you if this is the game for you or not.