I remember seeing this game on one of Mark's streams. I can see it's been improved upon quite a bit. The UI has become much more clear and the gameplay is more fleshed out.
While I got into the game without much difficulty, I think a small intro, perhaps something tutorial-like that leads you through the first turn, explaining your options and what steps to take, could still be a good addition.
Hovering over cards, I expected an explanation and only saw that an info card does pop up until much later. I definitely moved the mouse too fast to be able to notice that. Think it's better to just have it pop up immediately on mouse-hover, no real reason to put in a delay.
After playing the full game, all the cards and their effects are clear to me and I was able to win. It was fun, but it was also not terribly challenging. As someone else pointed out, I'd also expected the farmer to make moves that you might have to counter. As a random idea: the farmer might simply have ulterior goals? Growing other plants that require other types of care; not a lot of farmers trying to grow cacti I bet. The nature cards also sometimes halted my growth somewhat, but didn't do much damage either. I didn't feel like I had to plan ahead for winter, for example; I just kinda played whatever random card the game provided for me, usually picking flowers.
I just watched a documentary covering cacti actually, so if you'll allow me to spew some random ideas: given that cacti store water so well, there's lot of animals (mainly birds) that try to get a sip of that, so there are ideas for other obstacles to encounter, and expanding on that, perhaps the cactus must make different choices to survive those obstacles; flowers as the end goal or growing spikes for self-defense. For that matter, flowers are grown to create 'offspring', so perhaps it becomes a choice of growing your main cactus taller, or growing flowers to spawn new cacti. Anyway, just thinking out loud here.