I really enjoyed this literal interpretation of role reversal!
The role switching mechanic was really fun to play with along with swapping places with the other. I also felt that the challenge was just appropriate enough to make me want to finish it. I also love the artwork of the stellas.
I almost beat the game but got too distracted right at the end and ended up failing. Just to let you know, there was a bug on my PC were the "A" key wasn't working for the red Stella but the arrow keys worked well enough so I played with them instead. There are also some visibility issues with the stellas in shadows.
Great game overall!