There's an idea blossoming here (forgive the pun). I wish you had more time to really make it all come together. Like many others here I fell off the map and had a really hard time navigating with the controls. The speed was just too fast. When talking to the flower I get a dialogue box but no text appeared and it wouldn't leave my screen. Slicing produced a slash that billboarded the entire length of the map! Pretty crazy attack!
Overall a very ambitious attempt for being a first game. Going straight to 3D billboards is wild! Nice attempt.