Make Some Games With Boss.. (OPINION):
1): You Must Jump On The Boss Head Then He Take Damages
2): Add 3 Enemies On Each Levels. Ad 5 Enemies On The Next One Jump On Their Heads Too 1 Hit Only They Die Making Game Harder Making It More Good
3): Do You Had Timer When The Timer Goes - Their Well Be Ghosts That Invunerable Then If They Hit The Player Its Game Over
4): Add A Pause Were There Well Be "Return To Main Menu" Words And The Player Clicks On It He Goes Back To The Game Menu And Had To Press The Word "Continue" So They Continue The Level They Had Started..
5): Also You Need Good Grahpics It Well Make The Movements Good And Make A NPC To Talk Just Pressing Any Key (Its Your Choice) Make Many Enemies As You Want Or Make Hard Enemies (I Mean Not Boss) Make Your Enemies Health (The Health You Wanted) Then It Would Be Good
6): What About Caves? With Cave Men That Has A Regular Pistol (And The Color You Want) You Stomp On Their Head 5 Times Just To Deafeat Them And Add Boss Caveman Too, How Can There Well Be Cavemen Without Boss Caveman??
*OPINION FINISHED SORRY FOR THE LONG POST*