Preseting Your Hidden Object Game

My learning topic is about space and the planets and about what can you find in space and the player will know that theres almost nothing in space only rocks and plants.What I research about the planets was if one of those planets could support life.What I learned while researching it that some planets use to have water on them.My idea change when I try to think about more objects to hide and I couldn't think of anything so I thought drawing the forest would be more easier to add more objects.I still don't add game ingredients because I had problems with my game.I only have my objects disappear.What I em trying to fix are my game ingredients but its a little difficult and I like my game but I think could have done better.