This song would have sounded so good with a light orchestra and a vibrato heavy cello and violin playing minums through each bar while the kalimba does its thing. Maybe even another kalimba to harmonise and add some rhythm. Also, the first half is dangerously similar to another piece I've heard. I'm thinking it sounds a lot like https://www.youtube.com/watch?v=v712NiVK5uY but there's one that has the same melody as your piece but I just can't find it. It half reminds me of a battle block theatre song. Maybe one in the lobby, I'm not sure. Even if it's intentional or not, there's a song out there that sounds incredibly similar to this. You're just lucky none of us knows the name of it.
Response: Hmm, I don't think it's those that I'm thinking of. That melody sounds really familiar. Like that one song with that weird frog riding on some robot thing running from robots (I know, very descriptive). I'm not sure. Some knowledgeable wizard of a person will appear from the dark and discover the song that I'm thinking of.