The downloadable ZIP file contains an mp3 and an m4r (this one is for your iPhone)
Installation for iPhone:
1) Click FREE Download to get your ringtone
2) Once downloaded, open the ZIP and double click Marimba Glitch.m4r
-> that opens iTunes
3) In iTunes go to your Tones
4) Select “Marimba Glitch” and drag and drop it on your iPhone.