Awesome concept!!!
few things-
I'm in "Rage Reset" mode (and James - ZPH too), as the Game Reset switch doesn't work and I have to physically restart the ROM everytime I die.
With the word "Trenches" in the title, I figured the goal was to hide behind the walls and jump over them to snipe the enemy, not jump on "top" of the walls. I was expecting to hide in the "trenches" (black areas) but kept dying til I figured out what to do.
Level two is really hard with the grenade as the arch doesn't change the longer or smaller you hold it. Might be something that could be added later (i.e. like arch in Cannonhead Clash).
I wish there was another way to toggle between guns and grenade, or at least lock it in. It would switch when I didn't want it to.
Please continue... can't wait to see future levels!