Anti-Idle the Game was an absolute house of a flash game. It may not look like much at first, but it unfolds into the most ambitious incremental game of its era.
Sorry for the reply spam, I would also recommend the epic war games and the feudalism games. I remember trying to get around my screen time limit as a kid so I could play the feudalism games longer.
That game in the thumbnail and right at the top, age of war, is really fun. I used to spend a lot of time playing it when I was younger. There's an age of war 2 as well
Toss the turtle is fucking goated. Spent countless hours watching that turtle die horrendous deaths so that I could buy bigger cannons to shoot it out of.
Fantastic Contraption 2 is a puzzle game where you construct vehicules and catapults to get a red round in a square. It was really fun to play with a collegue. We would show our craziest contraptions. https://flashmuseum.org/fantastic-contraption-2/
Whoa, looking up Spybot unlocked a memory I'd long forgotten. Did you ever play Junkbot (another Lego game)? It was a Lemmings-y puzzle game in which you placed down Lego blocks to help a robot eat all the junk and get to the end of each level.