Absolutely!! If you're not able to grab a copy of WinRar to open *.rar files, you can totally grab the Zip versions of ANY of the Screaming Brain Studios asset packs HERE free at OpenGameArt! Same exact packs, just packaged as *.zip files :)
I just haven't quite gotten around to uploading all the *.zip archives to Itch.io yet! ** EDIT: Actually I've gone ahead and uploaded the Tiny Texture Pack 1 archives in *.zip format so you can grab them here instead of somewhere else!
(I will get around to uploading *.zip archives for the other asset packs as well soon!)