Played for 6m13 ;-) But indeed, at some point the dice become unreachable because the screen is clogged with slimes. Maybe allowing multiple dice to spawn with time in between would help?
Oh wow, I barely got 5 minutes in my best run, well done! :D
Yes, that's also what killed me most of the time, especially when I became too greedy. I think once I add AoE power ups like grenades or bigger bullets it might become better, but your idea is actually great too! Thanks for playing :)