That word counter is very sneaky! Haha! So, point values on what it costs to level up skills and attributes. 5, 10, 50, 100 points per level of statistic? And then point values of creatures fought; maybe their total attribute value, or the number of successes above 0? Just these two things could give a full system to allow stronger and stronger characters that would eventually break through the alien technology and blast them off their Dyson Sphere.
But just getting a bonus in one or two skills would be nice, depending on if that skill was even used. Again, all sorts of ways to use this system and add-ons to create for it.