Snake or no snake? Lol

Sooo I had this great idea 💡 (sarcasm lol) to put our old play mat in as flooring over a tarp over dirt in my daughters floorless playhouse.. anyway we came out and it was super lumpy, I took these pics and it looks like a snake is under it, anyway I think it snuck out or it went under the tarp because, when my husband came over finally and pulled up the tiles all that was there was blue tarp and no brown leaves or anything to resemble what I see in these pics. Am I trippin or is there a snake? Lol we will be pulling up the tarp tomorrow, it’s tucked under the structure so I decided to wait to do that.