Glad you managed to make it through despite the issues! I had some problems with lag myself while testing it and although I more or less eliminated it on my machine, based on the feedback here it seems it's not running smoothly for everyone. The effects to indicate how much damage you've taken could probably use some adjustment too: currently the saturation of the game's colours directly reflects the player's health (so 50% health is 50% saturation), but given that it's impossible to put an actual number to what you're seeing on screen, it should probably go full greyscale at around 20% and play a heartbeat sound for good measure.