Great work, everything is perfectly polished.
In the video at 2:28 is the effect of the enemy explosion. I would try to replace this squares with something softer, maybe circles or somethings else. For my personal taste squares is too sharp for this, all other explosion effects for enemies is perfect and much better fit than this.
Death animation for player looks good, but yes, maybe not fit very well in the game at first look.
All other is perfect, i like all effects, new enemy battle and new wall movement looks really cool - great job!