Hey, I'm finally getting around to reviewing your audio stuff! Yay!
I love the cool effects you use, a lot, as well as the structure of the song - how it builds up and then lets go. A couple things I'd like to mention, from a compositional standpoint. One, the song does feel pretty repetitive in a couple of places because of just how long you use the exact same chord progression and the same kind of musical elements without making very noticeable changes. Two, there doesn't seem to be a very clearly defined melody here, which I think adds to the feeling of repetition, but I'm also pointing that out because most of Undertale's soundtrack has very clearly defined and memorable melodies, so if you would like your music for SjalTale to sound more like Toby Fox's music for Undertale, I can help you practice writing melodies. Overall, you've definitely proven that you can use whatever software you have, but I'd recommend you work on the actual music writing itself. (Or at least, that's my diagnosis for this piece - I'll look at more later to see your improvements from here!)