About the blocks, try unlocking the vox-l artifact. To do that, click the red square on the learntomod homepage, then click to remove the purple filters. Vox-l should be the first thing you can buy -- it's free. Buy it, then make sure it's enabled.
Then, go back to the badge you were working on, refresh the page (f5 on the keyboard) and you should be able to see blocks.
It's not currently possible to see creatures in the simulator at the moment, however.