I will certainly corroborate the other players experiences here, in your Steam demo I experienced the same issue with all "object" blocks being missing the first time I played. I selected Medium difficulty (Snazzy or whatever it is) and nothing appeared, so when I killed the first enemies and got to the first "locked security door" I wasn't able to bypass it, which resulted in a length of time of me running around the map feeling as though I'd missed something. Now, that said, I'm also frustrated by that feeling quite a bit in the maps, even with seemingly all objects located; quite frequently it seems as though there are secrets that I cannot access/bypass, and there's zero indication as to if that's due to a failure on my part to "unlock" the secret (namely the heart leaf wall in the third map?) or if it's a bug where something is missing that I cannot see.
All of that said? I freaking love this game, and cannot wait for your full release (literally). I've played pretty much all of Bad Toys 3D that I could find out in the world, since playing it as a kid on a very old demo disc collection we had, and Toyful Wonderworld fits that missing puzzle pieces place like no other could. It's such an odd niche little piece of nostalgia brain that this scratches, being this weird almost MS-Paint Wolfenstein world, but you hit the nail on the head better than a 100 ton power hammer ever could.