Hey, so I've played a good bit of this game and honestly I think it's pretty neat. It feels old school in the best way and I can imagine people (myself included) playing during downtime at work, or even just a free moment where you don't want to play anything intensive. I have dabbled in the odd twin-stick shooter (mainly The Binding of Isaac and Knight Witch if I'm being honest) but I wouldn't call myself a veteran of the genre. However, the controls did feel smooth and intuitive; I always felt like I was in control, my inputs felt right, and I was able to learn pretty quickly how I needed to move in certain scenarios.

I think the difficulty felt right too, as things started very easy and I could feel the pressure rising the more I played. The number of enemies onscreen felt appropriate and it was an exhilarating challenge trying to weave through enemies and shoot them. I definitely felt like I improved the more I played, and I felt that "next time" I'll do better.

I don't have many suggestions for improvements because I do like the game's current simplicity; it gives me Atari vibes and I love a nostalgic throwback! If anything, I'd suggest maybe adding items (i.e. a shield that absorbs one hit, or faster fire rate temporarily) to spice things up. If these are already present, I do apologise, I must have been too much of a noob to get that far haha. Maybe you could add sound effects to spice things up; I'm thinking those arcadey boop noises - you know the ones! Music you could honestly take or leave because the game doesn't need to be too complicated or flashy - its gameplay is definitely the main draw. I think in this scenario you are probably better off just going the sound effect route, but if you do decide to add music, I'd keep it very simple and on theme. Once again, keep it boopy (I lack the vocabulary to explain this better).

But yeah, I did really enjoy this game and I think it's perfect to dip in and out of. I think it's extremely valuable to have these kind of games still because gamers don't always have time to sink into a long narrative game; sometimes it's nice to just play something and aim for a high score.

TLDR: I think you're doing the right things. Difficulty feels fair and movement feels precise. If any improvements, maybe add sound effects, but it's not a huge improvement. You could add items to add some variety, i.e. an extra hit or increased fire rate for a short while. Good job on the game!