This is a fun and charming game, I enjoyed the balance of randomness and strategy, and the sticker interactions (shotcorn my absolute favorite). Won it on my 4th serious try.
If I had complaints it's that it played too long and seemed grindy at times, I think a 5x5 grid would still be fun but make it a sleeker experience.
Also, being able to aim the pointer with arrow keys would help a lot.
I figured out most things by observing the game but the 15% bonus had me baffled. In the end it didn't apply to my best shots.
Echoing the frustration of wasting overkill when the target score is close. There should be a reason to care about maxing every shot.