Last Post: 5:23:53pm, 03/29/2020
Megamania was one of my favorites to play on my dad's 2600 when I was little. It's a vertical shooter (horizontal movement only) with goofy sprites. Pretty sure the stages just loop eventually and get faster/harder, but I may be misremembering (or not good enough to beat it).
Tough choice between Kingdom Hearts and Portal.
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AKA Bobogoobo