Although, there are some problems with the game, because of the rogue-like nature of the title, as the whole level scheme changes, and there is no way to detect the enemies’ movement or placement.
The enemies can shoot while crouching, and going into the doors means seeing them as a crowd; but because of their touch-free-ness, they won’t hurt the player through the progress.
And since it’s a modern version of Rolling Thunder, the game notifies the player when the special weapon is running out of ammo, increasing the pace of the game to proceed as fast as possible.
However, you have to utilize your ultimate endeavor to beat the game, since it’s really a difficult title, especially for modern players. You cannot shoot upwards, and even diagonally, and doing so in the air is impossible! So do not forget to make use of the two-tiered layout of the levels!
Links to get the product:
Watch the complete walkthrough by the developer himself: