Thanks for playing. Sorry for the late reply, this was stuck in approval hell and I didn't see it until now. (and SOMEHOW bots posting phishing links don't get quarantined)
Actually, her grab attack is meant to be easy to dodge, since it's quite deadly if you get hit by it (although it doesn't directly kill you). In the setting, this technique is supposed to be really hard to use effectively, which is why you need to practically be standing still to get hit by it. The somersault kick is a little fast, and I'm planning on adjusting the timing next update.
For the shuriken blocking, just like how you can parry some projectiles, enemies can also parry yours by just attacking. I think the speed and effects on this are set too high that it immediately travels across the map to hit you before you can see it, so I'll look into fixing that next.
Louise's AI is frankly quite a mess at this point and I plan to overhaul it at some point.
There's also been some other updates to the game since this post was made, so please do try the new changes.