Sorry it's not working for you, Friend-chip. Which version are you using and which OS are you on?
On Windows, you should just be able to run the .exe file.
On Mac or Linux, you'll need to install Love2d from this website: https://love2d.org/. Once you've installed Love on those OSes, you can check this section of this web page for instructions on how to run the game: https://love2d.org/wiki/Getting_Started#Running_Games
The short version is, if you're on Mac, you can drag the Dungeon Of Flowers .love file onto the Love application icon and it should run. On linux, you can run the love command with the path to the Dungeon of Flowers file as an argument, like this:
Hope this helps and thanks for your interest in the game :)