Would be a good idea to create an executable for easier distribution, not everyone wants to download extra frame works on engines onto their computers-
That aside, It is difficult to judge, and the game crashes after 10 seconds in. The graphics are so and so, but I dont really know about having shading on the 8-bit graphics if you wanted to keep them so pixelated, might as well kept the look :).
Otherwise, There is a decent loop in the background, but no sound effects from fireing and doing the sort, and from what I can judge from the gameplay, its rather simple, but ok. In my books its slightly skims the surface of theme "Alone", but it is easy to forget with enemies buzzing by constantly.
Anyway, a solid attempt, if wouldnt crash.