I found the game really enjoyable. But there are a lot of small things that were bugging me.
Getting out of the castle was a bit wonky, after you get the LMG the game became extremely easy, there should be a way to repair your armour,shield and bike, you shouldn't be able to shoot while searching (but if you still want to shoot you atleast have to make it very inaccurate because of the less stable one-handed grip on the weapon).
If you are making a sequel, it would be very appreciated if you make it a bit harder (or put a dif. choice), nerfed the LMG, made more upgrade trees like firing speed,accuracy while searching,luck(less of a chance for parts flying off,less parts flying off, and less of a chance to get transported to the jurassic time period) , added more stuff to do in the fort (healing bay, ammo making).
I've also got a really good idea, but it's probably suggested by everyone and their dog. Instead of ending the game when using the time machine, maybe use it to go to other time periods (by player choice), where some enemies are just reskins and other are time period specific. But, there is a random chance of 1 to all of the pieces of the time machine flying off, and a random chance of being transported to the Jurassic times, where the dinosaurs are a bit harder than everything, have more health, are faster and do more damage.
I hope I at least inspired you a bit, I really enjoyed playing this game and If you think that any of these ideas are interesting feel free to use them. 4.5/5