The visuals are nice.
Boss fights are fun but could use some work. They are fun at the start, but some of them get boring when you get their hp bar to half, because instead of getting harder and more exciting, they actually get easier...
Also, some boss fights are the same from the beginning to the end. It's not that they aren't fun, but being a platformer twin stick and all, you kinda expect scenario changes/harder patterns when you get them to half of their hp.
The statues and shield bonuses are nice, they add a castlevania feel with the secret places and all, but I just wish we had more hidden secrets and better hidden areas.
The soundtrack is amazing.
I wish we had more powers too. Most of the guns are okay, a few are extremely powerful and just removes any kind of challenge the game might give it to you.
We could use more enemies. Many of them are reused in every stage, with a few unique enemies per stage.
We could use a time attack mode and a scoreboard.
Zane is not well balanced. The stage is a piece of cake for him as he pretty much one hits everything. Some boss fights can be nearly impossible to him, though. But it adds a challenge, so that's actually cool. Boss fights get exciting again, all of a sudden.
With all this said, it is a decent game. It's actually a great game, being "Viktor 1". I recommend it, and I hope they make a second one with more content and better boss fights.