So I'm sure a few people already know how to do this but I just figured it out today and I thought it would be neat to share it with the community
Step 1: Search "virtualbrowser for firefox" on appstore (it's free!).
Step 2: Download it and wait for it to install.
Step 3: Open app and type "runerebels.com" into the address bar, tap return.
Step 4: Tap the "Play" button, "2006 remake; Runerebels" (or worldscape if you're feeling frisky).
Step 5: Tap on which world you'd like to play on and wait for the game to load!
Tips: Tap the arrow in the bottom right corner and then enable "mouse mode." I found it was a lot easier to navigate and play using it. Single tap for left click, tap with two fingers at the same time for right click. I do not recommend doing any intense activities in-game (such as tanking dragons or something) while playing this way as there is a decent amount of lag, but good for chopping trees, fishing and whatnot!
Not sure if it works with android or anything else, I've only tested it on my iPhone 5c.
Have fun :3
Edit: It is only free for 1 month. After this time, browsing becomes undoable until you purchase the "premium version."