Naji , practice makes perfect , you won't become better by abandoning , have a look at many indie games
Towerclimb ( This is a gem in the darkness of earth , not much was done to promote the game )
Meatboy ( Had a lot of hype from Meat boy Flash)
Escape Goat 2 ( Lots a hype from the first )
Home Alone ( Game that did a decent effort at promoting itself)
Fez ( Controversial game that sold a sh*ton , Fez 2 had so much hype , dayum )
Etc.
Those actually take more than 5 minutes to complete and have more than C2-Editor Mouse-Drawn Graphics (yours actually don't look that bad , but still , they are not appealing , they lack much of realism like shading , hue shifting and such ) , etc. , or if you can't draw , collab with some peeps to maek gaems