This is a decent survival concept with a good variety of dinosaurs and prehistoric creatures. The automatic attacks allow the player to concentrate on movement, positioning, and avoiding the growing number of enemies.

I was initially unsure how to attack because the game only explains that movement uses WASD. I eventually realized that attacks happen automatically, but this should be stated clearly before the game begins. A short instruction such as Move with WASD—your weapon fires automatically at nearby enemies” would immediately solve the confusion.

The dinosaur sprites are good, but the environment is visually sparse and the similar background colors can make the action harder to follow as more creatures appear. Additional terrain details, stronger contrast, and a visible survival timer, score, or defeated-enemy counter would make the experience feel more complete. Upgrade choices or new automatic weapons would also add more progression and replay value.

Overall, it is a decent concept that fits the prehistoric theme and survival requirement, but clearer instructions and more gameplay feedback would improve it.