You have the train station which is all entirely timed in order to get to the end, feeding the cat which is also timed, getting to eat all 4 meals, collecting change around the school for vending machines, managing pills so you don't get a game over, there's quite a bit more stuff and then you have the SRPG part which the adventure part is tied behind and you need to S rank fights in order to have enough chips to fully upgrade all the Sentinels. Sakura Wars didn't even bother going into that back when that series was tied to the SRPG aspects, and 13 sentinels still is more elaborate than Utawererumono in that regard.