So here's April 2017 update:
YOUTUBE VIDEO:
[ Show youtube player ]
At this moment you can see of what this engine is capable of.
main changes:
+ up to 20 enemies on screen at the same time
+ in-game music
+ improved collision detection
+ points
+ loading animation
you can download 0.8 build from:
https://1drv.ms/u/s!Ais-SkT4TSKuiR4ct-k6qoXgD7sj