I can see the stylized lightning from the Flash logo (DC Comic's).
The spiky ends/blades remind me a tad of Iron Maiden's as well…
The "X" is daring; the diagonals could look more balanced thicker.
Homothetic (mirrored) glyphs, thus minimalist (cf. "Q" ~ "a").
Many repetitions add to this style of fontstruction, IMO.
It looks directional, square, almost stencil, and rather black.
This mix of features and rules might lower the legibility,
but I think your "Flash" will look nice in e.g. -shorter- logos
(the test string "FLASH" may call for an alternate "L" & "A").

• This way of capitalizing makes sense as a title/logo font. ("Flash" test is cool and "Fl" quite logical about the square lowercase!)

• I don't know about the "X"; perhaps it could use some "/" (cf. "Y")?

• I saw a few similar fontstructions yesterday, that use "holed" bricks (the triangle in your case), so I think it's difficult to be original here again.

Yep, "XY" look great together!

… now that I tried "SFX" (cf. your game), we see it could be kerned a lot (v.s. "SF X", although this is another hassle). :-/

"The X-Files" look quite OK (perhaps a kerned hyphen, again).