Few things, the files come in .dds, not .iwi, but if you are going to add .iwi's make sure you keep the .dds, as some people (like me) like doing it themselves. Also, could you maybe make more than 4? Maybe make like Deadshot Daiquiri, Stamin-Up, and PHD Flopper, and maybe even some BO2 perks. Maybe some drops like Insta-Kill and Double-Points? Also, maybe make the Quick Revive a little less stretched, but the icons look good! Thanks for sharing!
I forgot to put the IWI files hehe... but I am starting to do the Power ups soon, but for right now I am going to work on the Bo1 and Bo2 shaders! Thank you for letting me know!Also, make sure that you do fix the Quick Revive shader, as it looks bad, as it is super stretched.
UPDATE
I added the IWI files because I forgot to put them in their when I was 'bout to go to sleep and Oshwat reminded me (Props to him).