[boxed]

Proton should probably be splittable into quarks.

[hopfog]

Getting the second resource (can't post emojis here) means you hit a quark, loop or a dead-end. I have a version where it continues splitting to up/down quarks and then fantasy matters but it quickly derails into chaos.

[timvdalen]

There's a Quark unlock you can buy with the prestige points, maybe it's unlocked by that