[Based on 0.5 demo version.]

Fun enough, but definitely needs balancing before the final release. Managing the two different currencies is a good mechanic, and you're definitely encouraged to play around with different builds and paper types at the beginning when you only earn Rollcoin for finishing rolls, but about five minutes in you get passive Rollcoin income which immediately dwarfs everything you've been doing to bootstrap.

From then on it's a matter of trying to deal with bottlenecks to afford new upgrades (but it's always rollcoin that's the bottleneck), then prestiging to earn a few Tiles that let you start filling out a skill tree. Notably, the skill tree includes a tile multiplier -- but that only applies to prestiges after you purchase it, so unless you rush it ASAP (and get painfully stalled out on your progress because 5 points buys significant multipliers elsewhere) you're permanently losing the chance for additional tiles.

Meanwhile, your gameplay experience -- especially when you have skills activated -- will mostly be watching rolls instantly vanish, and then sitting through the 3-second roll change animation, during which you're not earning anything except your (lower) passive income. It's still strangely hypnotic, but it definitely could use finer-grained control over roll density versus velocity.