*deep breath*
On the subject of room objects: Yer aware of spikes. I think it stems from them being very hard to see in some rooms. The 2x2 blocks that destroy into... a myriad of object asteroids, some of the asteroids are... near invisible. I've taken lots of chip/shield damage from unknown sources, and this one is at the top. Damn small rocks.... grrrrr. The rest of the objects that come to mind are pretty good, black holes/attractors being a fine example.
On the subject of items: The energy weapon pool is good right where it is. Plenty of variety, interesting effects, good stuff. Primary weapons, I've seen 2 other than starting weapons. 2. In 15 runs. There definitely need to be more here. Attachments are in a good spot I feel, also good variety. Use items... could use more of them, but also enough variety to be interesting choices. My biggest gripe about primary/energy/attachments is that you can get multiple of them in the same run. To take a page from BoI terminology, they need to be removed from the item pool if they're current equips or found in the past.
*breathes again as it's been 5 minutes*
Now that the grit is there, I can speak on ideas. Oh man.
Primary weapon ideas:
So, classic suggestions from other shooters, grenade and missile launchers as primary weapons. Would be a gameplay style changer, for sure. A lot of ways to damage/kill oneself w/ these, that's drawback enough, and the damage potential would be the draw. They also wouldn't destroy bullets.
Laser weaponry. Slow, decent range, fire and forget. Drawbacks could be low initial power, or one 'shot' on screen.
Some of the energy weapons could be moved to be a primary weapon as well. Example would be the shotgun. A charged primary weapon.
Room object ideas:
Bumpers. The annoyances those alone could cause....
Trap turrets. Undetectable by the player, and when the tile is run over, out pops Mr. Happy.
Dark rooms. Kinda like yer already present blood rooms in idea, but w/ enemies.
What I could come up with in 1/2 hour of storming. I'm sure there will be others of better caliber/quality to come along (And please speak up! This is a great game, and I would love to see it succeed greatly!)
As always, thanks for your time.