You should.
No really, go play it! XD
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I own... 2 copies for the dreamcast and 1 for the gamecube. Also played the demo (which I wish the demo disk I had was still working ;-; ).
I've done pretty much everything there is to do in the game. The dark looper ish OP. D:
Randomly started hacking the game to see how it works.
One thing I like that I learned so far. The "un-winnable" boss battles, they actually don't have infinite hp. It's just so high (9,999,999) you wouldn't see their hp bar move unless you did hundreds of thousands of damage. I wonder if I could beat them if I took the time to try. XD