Do not take these drawings as what the game literally looks like. These are more "moodboard" drawings, what my faint memories tell me.
I wouldn't be surprised if I've already talked about this on this very forum, but it's worth another shot. I have very, very hazy memories of playing this Flash game when i was literally like 1-2 years old at most. I remember it being "on the Warner Bros." website (despite the fact that the image in my brain and the mockup you see above look nothing like the site does in the Wayback Machine.
The game itself involved you controlling a flying humanoid figure in a monochrome minimalist vector graphic setting. I remember seeing loads of boxes and stuff used as background decoration, making me thing it was like a building with windows. It was a vertical shooter that even as a small child I recognized had sloppy controls (though I could've just... been bad at games). You would fight a boss that was also a much larger vector humanoid. I believe you would shoot out triangular shapes. I remember really enjoying it, but one day it... just vanished off of the site I would go to play it on.
Also, as a bonus, here's another one I can't find anywhere. Edutainment PC game I played for literally a few seconds, saw a weird stop-motion marble face character who talked to the camera and it scared the shit out of me and I never touched it again. The image in my brain is a bit more vivid, i remember there being toys and stuff surrounding the fact and it having a sort of "I-Spy" vibe.