It's just a game or not?

I recently talked about making this game and it's ready to play. But now it is time to get another step in the right direction.

I've created this small peace of game, as an addition to a previous arcade 2D-Game. My game should give you a

challenge,  but without being a discourage or keeping tempers getting  frayed. But how?  

Well what will be a challenge for the player in a game? 

First of all we have achievements that will behold for your current level. At a another glance on a game you need be free, to choose your strategy - yes you reed it correctly. Where in the hell do I need some kind of strategy? 

Well, once upon a time when a big bang brought games created by human hands.   I'd like to find techniques to find patterns in arcade games and getting one path overwhelming a pile of enemies. But during a game its game play should become sometimes difficult. In some jump and runs or (Roleplaying games) RPG you could go on if you solve a puzzle getting some deep dive revealing a part of  a mystery that keeping its story more challenging. 

But in arcade games, you' be served with power-ups dropped by enemies. And those game play of my good old  time, I'd like in my game and bring it to you.

Now my game has collectable items. :)