Very cool metroidvania. I like the multi purpse of the plants. The music is very cathy and sounds are also also well designed :)
The tiles edges showing sometimes is of course unfortunate. Something with the configuration of the (pixel perfect) camera
I had a bug where after my first death the character would respawn sligtly tilted to the side and would remain so for the rest of the game even after deaths. This happend on my both plays so maybe it's a feature and there's some meaning behind it :P
The vines when thrown on the ground would let me climb in the air over them, not sure if it's intended.