Evaluation:
Don't worry about the vocals sounding robotic. They fit in the genre that you're going for. Interesting source, haven't heard it before; thanks for sharing it!
It doesn't feel fully developed yet even though the original is short. It feels like there is still space for more exploration and development with yours coming in at 1:49.
Low end does feel muddy as the bass takes up a lot of space, make sure you're applying EQ on it to remove unnecessary frequencies on it and EQing any reverb that may be on the bass as well.
After Measure 26, at 0:46 when everything comes back the track gets very full and looks like you really pushed the levels to be as loud as possible. Gotta keep some space in there for all elements to come through and have breathing space. You could achieve this with remixing the levels or through utilizing compression to duck certain elements out of the way. It's during this section that the percussion gets nearly buried completely and can barely make it out. You want to have the mix look more like the first half in the image above, you can see all of the peaks clearly and there's space for all of the elements.
Does the vox have a lower harmony? It sounds like there's something maybe a 5th below the melody line, but I can barely make it out.
Maybe try looking for another track that sounds similar to what you're going for here and reference it. Using comparison could help you clean up the mix if you really listen critically.