To give you an idea of one of the long sustained runs Reactoonz can go on, told here through the prism of Dice Fusion, this was over the last two evenings.
Starting balance, £180, 20p spins.
Eight hours (4000 spins) later (this was split over two Bandicam videos across two evenings hence the different durations), balance = £300.
Single best win (round finished at 649x).
(What you can see here is the 150x win with two doubling cubes to make 600x.)
And as you can see it's made light work of this bonus, this one ain't going wrong now!
It's the same game as Reactoonz, in the case of Reactoonz just make sure you're playing the 96.xx% version and keep plugging away at it, it'll get there.
Do be aware this thing can go on looooooong downswings, since you're just picking rows off a spreadsheet at the end of the day, it can and will go hours and hours and hours, many thousands of spins, without even picking one of the ~300x or better balls out of the bag, and that can hurt a bit.
It's one of those games you just have to dig in with and ride it out, and be aware of what it's capable of in all directions, be it positive, negative, or neutral.