Interesting. Turning elements into literal rock/paper/scissors amused me.
I found it way too easy to complete, though. It only took me two runs to get the true ending, which doesn't really convey Sif's soul-crushing hopelessness. When it's actually really easy to change things, it undercuts the narrative that Sif hasn't been able to change anything. If nothing else, I would expect them to just start doing things at random in desperation; that's usually what happens in time loop stories. (It's also a bit of a pet peeve of mine to have the unblockable attack do 9999 damage; it's just so obviously artificial. I don't know if it's possible in RPG Maker, but it would have been cooler if it just sent you to the game over sequence without any visible damage.)
Even given the theme of repetition, I still found the encounters too tedious, as they always are in jRPGs. I think it would be enough to make us fight the same encounters loop to loop without also making us repeat encounters within each loop.
The worldbuilding implied by the conversations is quite interesting, and the art is very nice, so I'll be interested when you complete the sequel!
(I have to say though, $12 for a game this short is a bit pricey.)