More or less every climbing gym have some auto-belays and in many ways they are God's gift to the climbers. The dilemma is of course that you very quickly run out of challenges but then you can go rainbow. If there are two routes that are too hard, just combine them and it is also possible to add one more color for your feet. There are endless rainbow possibilities.
Other challenges can be to do routes without any colored foot holds or by just using one of your feet or even one of your hands. The more different and crazy routes you try or even speed climb, the more diversified climber you will become. Long away from all the nice comfort routes the gym normally offers, which in the long run will reduce your climbing repertoire.