Well, usually I hold off on writing a review until after I've finished a game, but I have a lot to say about this one and I remember most of it anyway.
When I was about 8 or 9, I played hours of this with my younger brother. Never mind that we only had one keyboard to share, the disc froze up more often than not, and we were both pretty bad at it, we loved every moment anyway. I just bought it again today, and surprise! it's still good. Clearly a labor of love, if a little unpolished.
What isn't good game design is goofy and/or funny. What isn't goofy and/or funny is good game design. What isn't either of those is probably a little broken. Anything else is either John Williams' score or a plug for Lego Star Wars, and those both speak for themselves. Overall, this comes highly recommended. Everyone should have it.
P.S. Also, it has really good animations. My personal judge of graphics is it's not so much the models and textures themselves, but more the animations, sound quality, etc. That has to be believable. The caricatures of humans and animals in Looney Tunes, for example, look far more lifelike than the supposedly "realistic" carved wooden blocks representing humans in Deus Ex.