I only noticed bugs during merges. 2 times I saw an issue myself, and there were a number of rounds where it didn't seem like the math was mathing. Seemed like some really major spins were not being paid properly but with this being so fast paced I couldn't quite pinpoint what was going on. As for the 2 bugs i saw for sure; I had one set of slots both activate and attempt to merge with others, cascading back down into each other, with an end result of just a poof. they merged into nothingness.... ... that...

What is the secret to getting 500k in one run? Do I need to remove some upgrades to make it easier?

Like the title says, the game keeps crashing on me. Can't play for more than a few short minutes, not even 5 minutes, before the game just crashes on me. No idea why.

I got my wife back on the first run. Nothing left to do now. It was a fun minute though.