Cool challenging game!
Awesome game even if its very classic, just walking and jumping. Run at the direction at the beginning and jump when that spike comes on the opposite direction. If opposite direction, do the same (except when the spikes come, go to the direction). When everything goes too fast not until in a second you can die from the lasers, hold the jump button and don't release it. Just walk a bit. If your hand gets tired, pause the game when your dino jumps.