Played it once, some time ago. I think using rectangles is acceptable, but you could go more places with it, and a platformer is not a very interesting game.

Here's a similar better game from 1989: http://fools-errand.com/04-3T/index.htm

See, I love platformers. You don't like them, and that's fine, but your preferences are not objective truth. It seems like you're doing the same thing as ungzd, just in a more highbrow fashion and with genre instead of subject matter.

Thomas Was Alone is on the same level of expression as tumblr pics of Mona Lisa with cat face. But the difference is that Thomas Was Alone creators are confident that they've created Masterpiece Of Serious Museum-Grade Art. Just by reskinning Lode Runner with filled rectangles.