I enjoy this game a lot for some fast fun.
First i picked up stuff and throwed at enemy. Then i found out that i have a sword! I found the first level monsters too easy that way, because even my noobie method worked.
Then at the second level the bomb thrower and whatever monsters were way stronger. I enjoy the challenge, but sometimes i feel like something is missing against them. A shield or some skill.
One time i picked up a skull, went to a level up statue... i saw the exploding skull skill, clicked on it, then i blowed up. lol Then a monster was right there that leaves a skull when dies. I killed him, he exploded too and i lost all my lifes. Not sure if that skill is worth it in that way.
For extra idea i could see some secret passages like in Super Mario. Going through bricks at one point that looks normal, leading to a room with money or other stuff.