Only played through the first major boss so far and it seems like a decent game.

Visually, it's fine -- rather reminiscent of NES-era graphics.

Music is alright, at first -- until you start noticing the awkward point where a music track for a level loops and then experience it multiple times in said level. It's a bit jarring.

Enemies are generic fare and mostly consist of stuff that moves back and forth or moves toward you slowly.

Platforming is fair and reasonable, with a decent number of save points to restore your progress at if you get wrecked in some of the following rooms.

The first major boss was extremely underwhelming because Sydney doesn't have a whole lot of ways to attack or dodge at that point (read as: whip, jump and whip, or jump and avoid). I tried staying away from the boss and dodging the projectiles to get an opening to attack, but after dying a couple of times to projectiles or the purple lightning ball of death, I just went in with two healing flasks and brute forced the boss by tanking hits after dodging the very first projectile and just healing each time. If you mash fast enough, you can simply plow through the life total of a boss because it seems like the bosses have no invulnerability frames. I only had to heal once during that mash and then POOF! Dead boss.

It's a simple game thus far (just acquired a long range weapon/projectile, so finally an upgrade!), but it seems pretty much like a middle-of-the-road affair, but not in a bad way. Outside of the jarring music loops, the actual game is mildly entertaining. I'll write more whenever I get around to it again.