A short, fun game.
For this review I'll just talk about the shine mechanic. The way I see it, it does 3 things: reflect bullets, absorb bullets (giving you special ammo types), and movement. Each of these actions shares one button and one meter. But reflecting bullets is almost never better than absorbing them, so it's kind of a useless option. Absorbing the bullets uses more meter, but it gives you ammo that's much more powerful and fun to use than the infinite default ammo. My main problem is the movement from shine sharing a meter with the reflection/absorption: The fastest way to move is to spam shine until you're out of meter, and keep spamming it when you're out so you don't gain it back.
When replaying a game, I usually like to try to complete it quickly using my knowledge from previous playthroughs, but doing so in SLDL means i rarely use the absorption ability. The movement itself is fun, but it doesn't feel very dynamic (except for when using the ice bullets, that shit is goated).
It's absolutely worth it for a dollar though, it's a really neat little game with great boss fights and a surprisingly fun story, despite (or maybe because of) how its presented. I didn't really care for Yuuto Ichika mode or the arena mode but they're neat additions.
Looking forward to more from this developer.