The retro aesthetic is spot-on and completely consistent in all areas of presentation, a rarity for these kinds of nostalgia-type games.
Unfortunately the high amount of time you spend stunned when you get hit, and all the waiting for power to regen/waiting for the overheat cooldown (which only takes a few shots to accidentally trigger) can make the game feel kinda sluggish to play, especially when there can be so many enemies with letters to chase down all at once.