From the beginning I was wondering wtf was wrong with the controls, I knew there was something. At first I thought it was maybe lag, but then I noticed it was just when moving diagonally, but not always. Then finally during the first boss level I figured out that it was while I was moving diagonally while shooting... but not always.

Later on during that boss level I figured it out: You can't shoot while you're moving diagonally, except when you're moving up-right or down-left.

Unless you're going in those two specific directions, you either won't be able to shoot while you're moving diagonally, or you won't be able to move diagonally while you're shooting.

So the controls are really bad.

I was wondering why no one else was mentioning this, but then I tried it with wasd instead of arrow keys and the glitch was fixed.

Anyways, too tedious/difficult for my taste (at least relative to how enjoyable it is). The upgrades are way too weak and boring.

I keep getting back to this game from time to time. Yeah, it is somewhat minimalistic with only two weapons, albeit upgradeable, but it has the right amount complexity and mechanics to keep it interesting. The levels are quite tough but manageable and rewarding to beat. Also the presentation and soundtrack are top notch.
I am reducing one star from the rating for two reasons. The last couple of stages throw away the complexity and make it into a long obstacle avoider game. And the bosses really should have their health reduced like five times - you need around five or so minutes of sustained fire to bring one down, all while they shoot at you in simple and predictable patterns, yet one misstep during such a long fight will kill you, so you'll have to redo the whole thing again

that got hard quick and in a hurry

When i start a new game, it doesn't let me play, I cannot select a text. what should i do?

C QUOI CA CALICE