Not a bad piece of work, OpenLight. Great opening and upbeat work at the start of the song and continuing on throughout the piece. As I'm listening to this (and looking at the title), I'm definitely reminded of speed running (like Sonic) through an old-style map that is slowly sinking underwater.
Personally, I only have two problems with the song (one minor, one needing clarification). The first is that at 0:14, when you really start to kick things off, there's some percussion playing in the background (not the main beat) that drops off when you transition into the next phase at 1:04 (and at other points in the song). I only started hearing it after the third or fourth time hearing the song. If I'm playing a game level like I described above; I love hearing those additional moving-style beats . Maybe a slight increase to the percussion so that it is close to the main part of the piece without over powering it (again, personal opinion/choice)?
Secondly, at about 2:43, the song seems to go "flat." Was this a mixing choice? I know you did something similar sounding at 1:43, but it seemed to fit there because of how things were transitioning.
Again, love how it reminds me of running around trying to beat a level while the level is also trying to beat me. Great job overall. And good luck with this round of NGADM! Should be a great match-up between you and MainStreamBeats