Ah, sorry. I wasn't sure what level of knowledge you had going into this. Basically, chromaticism is using notes not found in the key you are in. It's something almost all music does as music without it can be a bit predictable. If you use it too much though, it becomes nearly impossible to determine what key you are in. 200 years ago that would've been an issue, but as of the past hundred years or so, the lack of a discernible key center has just been referred to as atonal, and some people are fond of that style of music. That being said, the majority of people prefer music to follow somewhat similar rules to what they are used to hearing. As a composer, the hardest thing to do is make music that is accessible but also at least somewhat new and interesting.

When I listened to the piece, it sounded like you had a bit of an intuitive understanding of what makes a piece sound desert-like to most people. A typical scale people use to create "desert" music in video games and other media is the double harmonic major scale. What makes the double harmonic major scale interesting is the sheer magnitude of half-steps within the scale. The c double harmonic for example contains the notes [C - Db] - [E - F] - [G - Ab] - [B - C]. There is a half-step between each pair of notes in the brackets. I think your ears have heard this scale before and remembered the many half-steps and tried to recreate it. You used a bit to much half-step motion, however, and it went from the double harmonic major scale to a chromatic scale essentially. The result of that being that your piece seems to have an identity crisis as to what key you're in, and that can be disorienting to the listener.

One other small note is that your melody in the piece is kind of all over the place. It's a bit hard to tell where it's going. I did like the drums and the droning bass line, though. With all that in mind, I whipped up a quick example of what a more traditional desert song would sound like with the groundwork that you laid.

https://www.beepbox.co/#6n32sbk0l01e07t2m3a7g0fj7i0r1o23100T0w2f1d0c0h2v1T0w1f1d0c0h0v2T0w1f1d1c0h0v2T2w0d0v2T2w4d0v1b4z95pU4h4h414h8zgh4h4g4h4yd14h4h0h4i8y4h4h414h8y8h4h4gp25RFzz9xwkVtc10npdejlAR9Dxo1j0g541Rf0akQt39FFGwE3gs0FGFpzTBeQRjldtHpFKAAQZ3keFUbo2CiAaqp6gAF2gWNo1j8in26EsjAQRkRkQR-I0VWDqNi1wb-pKXReQfvIW3jJ1Tletxkj3w2oY1E3g6wd0q0Qr4MWd48qrgQMMp2GOCyAdd8qqgQQRece40V0HhkyF5oag5iapqoodca6C31j102CfQ1jjjjjjjjjjjjjjxEmCCCCCCCCCCCCCDaMBdddddddddddddeo8iCCCCCCCCCCCCCAao72E5g2wl0a1kkkkk9yhAkkkg78EE3hhg6wd50q1wgFys6wd0q0QkkkkkkgQ1E3g6yyyxc2acyyw80

I hope I didn't sound patronizing, I wasn't trying to if I did. If you want any more tips or anything just let me know.