It's review time!
Yami - Intro Kick is a bit too agressive when compared to the rest. Can't recognize any source until 0:57. Lead at 1:32 is a bit drowned (and some of the bends are a bit risky, almost off-key). To be honest, the mix isn't very interesting, but it doesn't sound bad at all.
Tuberz McGee - Love the intro! Nice rocking guitars. The kick drum feels a bit sloppy. Prison Lane is clear in the intro. The transition to Needle Man is very natural. You mixed the sources pretty well, nice job!
Mr. L - Nice pad the intro, seems to be typical of you . Heavy dissonance at 0:23... I don't agree with the lack of melody mentioned by others, piano takes care of it nicely in my opinion. Biggest criticism would be that the pads drown out the rest of the instruments a bit too much during the mix.
By the way, if you feel the kick drum is hard to notice, try two things: sidechaining and boosting the higher frequencies. It's almost silly how much the kick gains with a good click.
therex - Nice song! Ridiculously energetic You went a bit overboard with the delays in my opinion though. Also, the first transition to Turbo Man's C section is a bit too sudden. The solo is super fun!
Cash and Change - For some reason your opponents never show up (like in the Maverick competition!). This is mainly Marble Zone and also mainly a bass... There's some terrible dissonance when Quick Man starts fading in, you should just transpose the song to another key instead of forcing it in its original key. Overall, this sounds like you grabbed a midi of Marble Zone and one of Quick Man and just put one after the other...
MindWanderer - Distortion guitar sounds straight from MMX3 This could really use some pads to create a more interesting mood, it feels really empty now. Bass at 2:48 seems a bit off. Overall, it sounds very empty all the time, drums aren't very powerful and there's nothing that gels the mix together.
Cosmic Sounds - Interesting mood created at the beggining, even with the not very good string sounds. The piano with delay was a nice experiment. Mega Water S sounds very unfitting with the slow mood of the song though.