The hit detection on spikes and the poison marsh seems a little off. Is making the sub-weapon menu have the weapons appear a little bit larger an option? I can see them, but they seem small. Granted the size you have them at looks like homage to the original game
You can also increase the resolution it changes the screen size. Making everything bigger. Fullscreen support also returning. Had some problems with it with vertical sync and fullscreen so I removed it for a while and forgot about it. I fixed the marshes for the next update and will do the same for spikes. Thanks for the great info.
EDIT: all spike/trap etc mask size reduced by 2. It's now a bit smaller than the sprite.