What to do about these floors?

Im a single mom and recently moved into our own space.

However the floors are cementy-ish like this… i dont want my son to get hurt especially since hes a toddler and throws his head back alot when having a tantrum

Hes done it a couple times and cried a little but thats it

I guess its almost sort of equivalent to falling on cement outside, no?

I live in an apartment btw so cant do much.. rental

Ive put some carpets down but its a pretty large space and I can only put so many carpets..