Twin Age isn't bad. Its core mechanics are sound, if inexpertly presented, and the further you advance into the story, the more the level designs open up. Boss encounters can be pleasantly brutal, especially when your foes start dishing out debilitating status ailments and effortlessly dodging your best attacks.
Its closest kin on DS is Contact, which was more creative and involving but also considerably more obtuse. There's a decent time to be had here, so long as you're willing to push past the (common, flimsy, immaterial, weak, babyish, infantile, and puerile) storyline and exasperating combat screwups.