Got 695 on the first try with one Suika and I barely played any Suika games before. A fun game concept with cute graphics here.
I think there is a bug when a fruit hits two identical fruits at the same time (they were lying on the ground). All three disappeared and I think I got the normal upgrade.
Keyboard controls would be nice. I misclicked a few times. Also it doesn't accept any kind of slight movement between mouse press and release as a click. Also faster spawning of new fruits would be nice. Especially at the start you want to quickly drop fruits and don't have to think much.