Making waves - cool sound, great opening/menu theme. The second half of the song, after about the minute mark there's a clash that I think could use resolving. D in the second chord (Db major) in the synth pad could be moved.
Boss battle with beer - cool dance track, needed some bigger moments I think. Maybe some extra layers, boost the kick and snare a little, a heavy lead synth.
We're out of time - same thing I think, strong ideas, feels a bit empty, add a couple drum fills every so often to spice it up too!
When the party is over - really great track! Drums throw me a little, I think if something else followed the rhythm of the hi hat it would reinforce it a bit. (Of if something does, turn it up in the mix)
Remix - I guess same comments apply, I like the variations! I did something similar with mine where I made boss track versions of themes.
Great soundtrack, had a strong sense of style and good ideas!