I really enjoy puzzle games like these! I've never actually played the original suika game but I have played a furry version of essentially the exact same thing called VFurrika. That game is okay but there are a lot of things that game does wrong that this game excels at!
First and foremost, it's amazing to see the delineation line of failure so that I know for sure how close I am to losing, but even then, I like that there is a countdown before actually losing giving me time to salvage the situation! I like the different game modes, too. While VFurrika (and Suika Game, I guess) is a cute and simple puzzle game, the addition of other game modes and powerups keeps things fresh and fun to play for... quite a while, actually XD Easily very addicting.
As for the feedback portion of this, there really isn't much I can say about it. I appreciate how time stops when the board is refilling. But, about the timers (the timer before another ball drops and the combo countdown timer), I think the ball drop timer is a little too small and high up on the screen that I didn't notice it for a good few minutes at first. The position might not need to be changed if it were a different color, something darker or more obvious to make it stand out against the background -- it camouflages with the background quite a bit.
Also, about the timers, again, I like that it stops when the board is refilling, but I think it should also stop for a couple of other reasons: after using your special ability and after leveling up/the character changes.
Firstly, whenever I use my special abilities, especially the ones that clear out entire sections of the board causing all the balls to move around a lot, I wait for the balls to settle again before continuing on. I noticed that after I use the ability, the timer is still going so I don't really have a chance to reevaluate the position that the board is going to take before being forced to make my move one way or another.
Secondly, I love the characters! The art is adorable, and of all the games on here, I am so glad I finally found something with cute males and their penises! I would like a chance to admire their bodies as I unlock (because I know I can come back later and look through the gallery, but if they're going to change during the game, I'd like to admire my reward for unlocking that as I do). I think that as you level up and the character's portrait changes, the timers should stop for a moment and maybe draw attention to the character's portrait changing so that we can admire it before resuming the gameplay.
That's pretty much all I have to say about this game! I absolutely love it and am definitely going to buy it to support it when I have the chance!