While 65 million years ago is a good game I think you can make some improvements,
1: Add some music, bosca ceoil is a great tool for music, it produces sounds that sound like it is coming from an older game console such as the NES, it should work perfectly with your game.
2: The stun gun should have a lower recharge time. With all the dinosaurs around the stun gun is almost necessary, I have died many times plainly because I couldn't use the gun
3: This one is just a nitpick, but maybe improve the controls, instead of the arrow keys moving your character, make the W,A,S,D keys move the character, E should be used to pick up, and C to use the stun gun. This should make the game overall more comfortable to play.
This game definitely isn't perfect but it isn't bad either, you should just make some tweaks to the game to improve it.