I think you succeeded in creating a "final boss" vibe. From the start I got that vibe, probably from the descending bassline (not sure why that gave me final boss vibes, but I have stopped making sense of my head). The electric guitar and drums add a nice bit of tension, especially at 0:45 when I was just thinking you should spice it up! Going from using the drum on whole notes to using them on every half note (and to go back to whole notes at 1:40) is really effective. I also loved that effect at 2:10 you did to end the song. That is something I could never do in Musescore ;). Your melody is repetitive, but that works well to create that theme, and you don't overuse it. Overall, great entry :D