Hey there Suzully. Check http://osu.ppy.sh/s/33906 for me then. I guess this classifies as a video game. It's currently on WiP forum because I need to finish my SB, but the mapset is complete and was pending, hope you don't mind this.
http://osu.ppy.sh/s/32706 in my opinion wats important about making a good beatmap is to have a good sense of rhythm. if u hav sense of rhythm u could quickly know wat to add.
accepting mod requests in-game, but chances are at 25(yes)/75(no), and doing m4ms on my own accord.
What I feel is most important and crucial for a good map is a couple of little things that go together to make it great.
From my experience, I'll say that good musical sense and the ability to align the gameplay mechanics (sliders + hitcircles) well with the song to achieve a flow that is intuitive since it's about good grasp of rhythm. You just need to be atuned with whatever song it is, and then visualize it in the form of mapping.
@Faust No problem, I accepted your request. Oh Rin's map? I guess it's perfect so it's maybe impossible to mod though hehe Well, I'll try to do my best on modding.