I like the concept behind the game, where Shiori has to go back in time to make sure the Advent members complete their escape from Justice so that the timeline is restored.
The character art is pretty! Good job!
The biggest issue I had was that Ame's dialogue took a long time to start. With her being mostly off-screen at the start it felt like the game had crashed. If possible minimize the moments where the player loses control of the character and "nothing" happens on screen.
I know you mentioned in the game page you may not continue this project, but I think it's a good idea and could be expanded into an interesting game with enough time.