As someone who is very terrified of edutainment games, this is great!
I haven't tried out the whole game (yet) but so far I'm loving it, especially the details like the cursor being corrupted for one moment in the sorting game. The little drawing of Randy when you get a correct question on the quiz is very cute :]
The audio really captured the feel of those games, as well. Great job!
Edit: Just finished the game and got the good ending (despite being partially melted from lava haha). I love this game! It all tied together nicely from the foreshadowing in the beginning.