[ALPHA] Parallax - Space shooter RPG Development

[PRadvan]

My short term goal is to create a simple space shooter with RPG elements.

I have spent the last 2 months working on my game engine, a few hours a night. I think I've reached the point where I could start getting some feedback on how it plays.

Link
http://www.philip-radvan.com/paralla...llax_v043.html
Arrow keys - move
Left click - shoot
Circle around player is the weapon range

Feedback
How is the performance?
Is this type of game fun?
Am I the only one in to space RPGs?
Is this game too complicated for someone to play in browser?
What features would you like to see?

Screenshot


Planned Features
Galaxy Map - Allows player to travel to different zones.
Zones - Zones will feature different enemies, missions, etc
Missions - Sends player on a mission in a specific zone to kill or collect something
Ship - Player will be able to buy better ships with more equipment slots
Equipment - Player will be able to get upgraded ship equipment from loot drops or vendor

To Do List
-Interchangeable ship equipment
-Shields
-if enemy within followRange, follow player
-Fix PlayerTracker - stops working next to edge of map
-Fix ghost enemy ship (can't shoot it)
-UI Screens
-Preloader

KNOWN BUGS
-Going to the edge of the map screws up player tracking, resulting in weird enemy ai/enemies not appearing
-some enemies disappear
-unable to pick up some loot

If you're curious, you can see previous game engine builds and how the game has changed. Link is in my sig.
For example, version 4.1 had projectile bullets but it lagged the game to hell.