90's computer game

There is a computer game that I've been trying to figure out for a long time now, maybe you guys can help. It was already installed on our computer (windows 95 i think) when I started playing it. It had a blonde boy, it looked really pixalated, you had to solve levels, and im pretty sure you had to answer math questions on the way. Im pretty sure the bad guys were pinkish/purple blob things with big eyes. You could jump into trees and such and I know that once I beat the game, it advertised a part two to it which was a haunted house (and maybe another one that was in space but not sure, Im only sure on the haunted house one). I've been agonizing over it for probably years now so any help would be awesome. Thanks!

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