There's two titles, (well, rather one title and one demo) that I've been trying to rediscover for several years. I've tried various different sites, including different Abandonware sites, and Reddit. No such luck. I doubt I'll have any luck here, but wouldn't hurt to try. So, I'll just copy/paste my postings from Reddit:
The first game is an Edutainment game, in the same/similar style to the Humongous Entertainment games (it's even a point and click game). I'm pretty sure it was space themed, with the main focus on math. I recall you could interact with the nobs and buttons on the spaceship before going on your adventure. I'm 99% certain it's not the Math Blaster games (On a side note, I should replay Math Blasters ages 9-12) I do recall one of the games required you to built a wall out of logs. I do recall two alien(?) creatures who, through my faulty memories, reminds me of Angry Beavers (mainly one of the creatures being brown, and the other blonde). Release date most likely was in the 90's.
The second game (well demo rather) I do recall you could create your own character (although very limited). One option was camo pants(?). Game's 3D, third person, most likely action adventure puzzler. I would say gameplay is similar to the classic Tomb Raider series. The game (or rather the demo) took place in a desert/canyon/mountainy area. I recall the character having a backpack, and a baseball cap. The only thing I recall is a long wooden bridge you had to cross. Release date most likely was in the early 2000's.