This was a fun and charming incremental game! I enjoyed planting grass, growing the dinosaur population, and saving toward upgrades. The auto-plant and auto-cleanup options are a great idea and give the game potential to continue progressing while the player does other things.
I would recommend adding a short directions or controls section explaining how to begin, what each dinosaur does, how feeding and breeding work, and what the player’s overall goal is. I figured it out through experimenting, but clearer instructions would make the beginning much easier to understand.
The browser version did become laggy, as the game page warned, and it did not take very long to reach the initial goal of 10 dinosaurs. Additional milestones, increasing difficulty, or longer-term goals would give players more reason to keep building their population.
Overall, it is a fun concept with cute artwork and a satisfying progression system!