A few unlocks are bugged for me.

[Darkunov]

I just did both challenges to unlock the light saber and the shrapnel bomb (in different runs) and neither unlocked. I tried both in normal mode and in the case of the light saber I used both continues, but the description doesn't say anything about it...

Also, the ultra super mega kusarigama only destroys spikes even though the description says it destroys "traps", so I think either that mechanic is bugged as well or the description should be reworded.

[Tetsuo9999]

The lightsaber requires a no-continue run to unlock. Trust me, it's not that bad once you've unlocked most of the other items. I used the whip or nunchaku, Boomerang+, Shrapnel+ and the fire magic to get mine.

[Bitmap Bureau]

Do you think the upgraded kusarigama should also destroy the spiked balls? I guess they're also traps. I think you're right though - either the description needs to change or the functionality does.

[Valen]

i dont think it'd make sense for it to destroy ball "traps". Heck I dont even count spiked balls as traps, I group them with Laser Barrel..things as Hazards rather then Traps. Though I do considered those statues as traps.

[Darkunov]

yeah I think if the kusarigama were to have its trap-destroying ability modified, it would need to be able to destroy at least one more type of traps such as the balls and statues as mentioned before, the laser canons, or the "thwomps". Basically, I consider anything that can hurt you and is usually only destroyable by bombs a trap.

EDIT: Also, I guess that if it were to be able to destroy the statues, you could keep Doom and Doom Ex's statues indestructible in order to keep some challenge to it :P