Classes were canceled due to inclimate weather, so I literally did download this Hour One. Here are my impressions from spending an hour with the game:
Of all the Blaster Master games that have come out since the original, this is the one that sticks closest to the formula that made the original work. That doesn't mean it's a carbon copy; not in the least. Everything you remember from the original is still here - Sophia's physics, getting out of the tank and exploring the inner caverns, and even remixed music from the original. The game is modernized, though, so there are save points and a map system. The gates (caves) are different. It's a little less about exploring potentially maze-like caverns for a gun upgrade and more about blasting everything inside to get to those upgrades.
Sophia's energy is shared by all weapons and power ups but it automatically recharges, and there are permanent HP and Energy upgrades scattered around so there is more reason to explore every gate and crevice. Inside the gates you now have switchable weapons: Rapid fire lasers, homing phasers and the grenade. The ycan all be upgraded and they still downgrade if you get hit.
I've died twice so far, once against the first boss. The game is harder than I was expecting it to be.