I think you have some interesting FX in this video (especially the opening toon effect and the yellow impact effect “namely the shockwave”).
I could take time critiquing the already existing effects in this video, however I feel that another topic would serve you better.
Visual Effects is a difficult “gig” to get into (especially at some studios). This is because it is a marriage of multiple disciplines (i.e. - animation, modeling, tech, simulation, shaders, deformation, lighting, etc.). I say this to make the point that - in order to stand out amongst the crowd, I would rarely spend time on generic effects that everyone and their dog is making (i.e. - explosions, fire, smoke, rain, etc.). Make sure you know how to accomplish these photorealistically and are more than able to expand upon them at any time. But focus on the difficult and more desirable effects. Things that show you are different than everyone else. These kind of effects are generally avoided by most intermediate visual effects artists due to their complexity. Here are a few: (Plasma Dynamics, Holographic Interactions, Advanced Transition Interactions, Scan Effects, ID Effects, Rendering Specific Effects (such as a multi-dimensional opening in 3D Space “Not a camera-facing sprite”), etc.).