So, there are two games that I look for. Main character was probably Rikki (maybe, I don't recall this very well), and there were artworks by various artists. Both games have the same name, second one is with 2 on the end obviously. First one was like space adventure with lots of points of interests that can be visited with different outcomes, and there was a time restriction on these actions. The second one is like COC/TITS, adventure on a tile-based map.