planeswalkers

Despite the amount of burn/kill spells, I don't think this deck will be fast enough to compete against the momentum of your opponent. Despite the amount of creatures you can kill during the early game, it will cost you mana and a card from your hand to destroy their creatures/permanents. After these are exhausted you will be top-decking for kill-spells while trying to play planeswalkers at the same time. Unless you had a way to mana ramp, it will be a while until you can play spells and planeswalkers at the same time. Simply stated, you will run out of kill-spells and waste the contents of your hand long before you can play a planeswalker. As a result, your opponent will have time to kill the planewalker or complete other strategies.

It'd take a lot of work, and this is only a suggestion, but perhaps the deck should be revised into one of the following categories: mana ramp, control, proliferate. I think an artifact/proliferate would be the most fun and effective. Using the concept for the Lux deck, you can utilize artifacts that either benefit from proliferate or use the ability. Tumbler Magnet will be useful to tap creatures, Everflowing chalice can be used to accelerate mana, Mirrorworks can be utilized to double the artifacts used, and Throne of Geth can help further increase the counters on items. Obviously there are many ideas to research, but the core of the deck would be to use non-creature artifacts to accelerate your mana and then accelerate the counters on the planewalkers to activate their final abilities as soon as possible.

You probably just made this deck for fun, but with revising it could be a decent deck for multiplayer, archenemy, and squiggles.