Oh man… they are great. The 2nd game is titled Crossroads 2: Pandemonium for a reason. It’s pure chaos! How they managed to make it run smooth with about 100 sprites on the screen at once, I’ll never know.
They are a ton of fun with a 2nd player.
Edit: I’d like to elaborate a bit on this… If you watch a gameplay video you’ll see that the screen wraps on most levels at a few different points. You can shoot, and the bullet will travel across the screen over and over until it hits something. When we played 2 player, we had a rule that we wouldn’t hit each other intentionally, but we would totally try and mess with each other as much as possible. We would shoot as many times as we could down one of the wrapping corridors, and step out of the way before getting hit. This creates a sort of wall of bullets that’s hard to pass through without getting hit. It’s great for taking our groups of enemies, but it also makes travelling around on the level more difficult. It becomes a competition to see who can mess with the other person the most, all while grabbing the most power-ups.
So much fun.
I also really loved the Jumpman games.