At first, I thought that this game was also programmed with a ballpoint. It's very awkward to control, there's too much acceleration going on everywhere, you have to change control modes constantly and the physics feel that everything is about to collapse at any second.
But I persevered, and after getting used to it's controls, I found myself liking it a lot. I love arcade shmups, and after figuring out how to buy weapons and equiping them, shooting sections very fun, although I found them too easy at first, I was having a blast in the later sections. There's no way you'll have enough ink to buy all weapons and try them without grinding, so I stuck to the ones I know I would liked and upgraded them to the max. Also, ♥♥♥♥ kamikazes, one touch and you lose a life, no matter how much you have.
Personally, I would've liked a score system, which also could have alleviated the frustration of losing a life trying to get a gold by gaining one after hitting certain number. It would be a nicer bonus for your skill than having a star that makes a short blast of bullets.
Also, the graphics are very unique and cool, but sometimes I feel this game is kind of egotistical, shoving them in your face. This is really a problem with a boss that shows up in front of the camera and blocks your view of the enemies, I dont mind it too much in the overworld, but it can be annoying. The opnly other graphical problem is in the last level, when all the objects being white becomes a problem, there were times that I didnt know where I was, what was attacking me and where it came from.
And lastly, I think that the game would be better if it had less focus on the overworld, specially platforming in there, and different music. My god, I had the game on mute 80% of the time, I was so sick of hearing the same thing over and over.
TL;DR: Like Skyrim on paper 420/666