some one can help whith that?? i so noob

you can see how to build a "go back "

this store is for game.. player can entry in shop and buy hp or power for bullet... and other thing...

I can't answer these questions because without seeing your game it is just guessing. 20px is hardly anything. You must have HD images present in the level or something to reach 141mb. You can delete objects and run the game to see how drastic the drop in memory usage is and what are the problem are

this in red is enemy spawn in game...

ibb.co/GHzCngM

but for put in hud i have take a new object...

I can't answer these questions because without seeing your game it is just guessing. 20px is hardly anything. You must have HD images present in the level or something to reach 141mb. You can delete objects and run the game to see how drastic the drop in memory usage is and what are the problem areas.

i discovered another error... a layer invisible.. if i touch a button.. this button work...