At first I was like, when am I getting my new parts? Lol. I don’t have a mouse, so playing on the trackpad was less fun than I think imagined. Also, no middle button for me :-(. It’s a simple game loop that most people can jump in and have fun, the arcade vibe.

I had a few issues with it. The sfx is pretty repetitive, did you vary the pitch? I think that’ll help me feel like I’m not hearing the same thing over and over again. The game could use some transitions between waves. As soon as you start a wave there’s an onslaught of bullets raining down on you. I was like “what the hell?” the first time I tried it lol. After I finish a wave, maybe small screen transition and a countdown would help. It’s way too immediate for a new wave.

But I like the simple fun, and use of the theme! Keep it up!

Really fun, catchy game! I found there was a bit of sound effect fatigue with the shooting sounds, and maybe some variation would have helped - I have to take off my headphones because the sounds were getting annoying. Also, a few times the enemy bullets wouldn't move offscreen of get destroyed, causing be to fly into them two or three rounds after the enemy was actually defeated. The art was great though, and I feel like I could keep playing for a while. Great job!

So, starting off on a strong point: game has no bugs, and is playable which is a good standard for jams. I could lose but I don't...think I can win? But that seems to be by design like old arcade style shmups (R-Type, Galaga, Ikaruga, etc.), so game accomplished!

1. I found the movement...a little unenjoyable. The ship felt ungainly, which I think is because the speed was lerping instead of being immediately responsive. It made it feel like a big, heavy ship instead of the small fighter-craft it seemed like I was supposed to be. Coupled with the momentum being imparted from missile collisions, it made moving around feel not entirely like it was in control.
2. I sort of reflexively avoided the first power-up for a couple waves, because I just assumed it was a weird enemy in the middle of the screen to spice things up. A minor effect to show it's beneficial, or some other solution, would probably go a decent way.
3. Enemy variety was a little lacking. By about the third wave, it felt like I'd already gotten enough of a grasp of the game to not be at risk of dying, or really needing to think much. (Sidenote: eventually, I realized you can just cheese the game by sitting in a corner and shooting diagonally across the spawn line.)
4. There's a bit of a weird bug where sometimes missiles would just get stuck at the bottom of the screen, and idle there forever, unless something rammed into them.
5. I'm not sure if this was a bug or I don't understand how the gun was supposed to work but neither clicking nor scrolling the middle mouse seemed to do anything. It wasn't a detriment to gameplay, but worth mentioning if you plan to continue working on this.

Now, the good stuff!

1. I think the concept of 'assembling' the ship is pretty great! Shmups are kind of a dead artform in general and most modern interpretations don't let you literally put together a larger ship like this.
2. The firing arcs were very well-done. It being done on the player and enemies is really nice, and helped add some interest to movement.
3. The feeling of progression was nicely done. Playing to mow-down waves and get the next shiny ship part was pretty fun.

EDIT: I actually forgot, but the SFX were really loud on my machine at first. I ended up cutting the volume to 10%.

Game has some good ideas but I think it needed more time to be really realized. 

You can lose, I don't know if you can win. Doesn't seem to have a score system or anything to really push you to continue playing once you have all the parts. Wave counter serves in this role but not really. 

Ship Assembly! Cool idea, needed something to really make it shine like the ability to choose which parts you get or maybe lose parts when you take enough damage or something in that line. The ship becomes a bigger target but you don't really get much for it other than more damage, and everything dies quickly regardless.

Guns had firing arcs so thats cool, but there was little reason to really favor one side or another even with the theoretically increased firepower when you got a new part.