Fun base concept but it scales too fast.
150, 226, 337, 506, 759... so 1.5x per.
Closest I've gotten was on the boss on round 6. Where the target was 1708... and that was choosing the shop every possible time even if I had no money.
1708/4=427. So you need 4 hands that average 427. Thats at minimum there are 3 yatzees
Possible combos:
A hand worth 88+and three yatzee with 6s
A 4 same of 5s and a 6, a 5 yatzee, and two 6 yatzee
Or four yatzees of which up to two can be 5 yatzees and the rest have to be 6 yatzee.
And most the upgrades are useless...
+x to hand contributes 4x which is likely less than 40. (2% of 1708)
Basic die, I already have 5. I don't need more.
Balanced die: per above, not worth taking since there is no 6 and a 6 yatzee is required.
Dice face, per above, unless it is 5 or 6 it's not worth taking.
Pair boost: you would need 15+ to get a high enough multiplier. Probably need 300+ coins which is not available
Full house multi. This might be worth it. I didn't check.
And the reason I am commenting this here rather than your survey is because I don't want to give an email but the survey required a sign in.
It's not a bad concept but riddled with scaling issues meaning that it is more luck than skill and closer to a grind simulator than a game.