Really cool game! I love the combination of a generally fun base game, plus the additional layer of gameplay twists.
That is, the general concept of combat with autonomous weapons, where all you have to do is move around, plus the whacky weapon upgrades--this is a really fun game on its own, it's fun to try different builds and its fun to layer multiple categories of weapons on top of each other.
But then, the additional layer of the malfunctions was quite fun by itself. All the graphical variation was super cool to see, and a lot of the malfunctions made the gameplay more interesting -- although I would say that, by the end of the game, it was probably getting to a point where the malfunctions were more annoying than fun, simply due to the number of them active at once. I think that's completely fine, however--it gives the game a nice arc, and I think that the boss fight does dial back the annoyance a bit, which helps round out the game. (Side note: I was very bad at the boss fight, and ended up with -150 health or something).
Unfortunately I did run into a problem that this game does not run very well on my computer at all. At first I tried the web browser version in fullscreen mode, and it basically just did not work. Next I tried to download the game (Windows version), and it worked even worse -- the game hangs either on the first or second level, and it hangs hard -- it's difficult to even open task manager to kill it. This admittedly was not very fun to deal with. (I also briefly tried to run the Linux version over WSL, but I don't think I have my computer setup for that to actually work lol). Eventually I managed to just play through the game on the web version, and it ran mostly fine -- although it did occasionally lock up briefly, and it seemed like it might break entirely at some point. I did eventually get to the end though, thankfully.
I think this is especially unfortunate because it meant that at some points during the game, when the game performed some kind of intentional malfunction, I couldn't tell whether that was a gameplay mechanic or if the game was about to freeze again (... and therefore force me to start over).
In any case, though, I did have a lot of fun once I managed to find a way to actually play the game. Besides the gameplay, I think the graphics were wonderful (especially will all the variety from the malfunctions), and the sounds seemed quite nice as well.
EDIT: Oh, well, I figured out why the game wasn't working when downloaded. Apparently my graphics card was unplugged. Now that that's fixed, it works fine when downloaded. 😄 It's possible that all the issues I experienced were just my graphics driver having a bad day. In particular, I realized something was up when I started playing a different GWJ game and had similar-ish issues.