Hello!
1) We're releasing to macOS and Linux as well, so I'm sad to read it won't be playable for you at all on Steam.
2) There are a few things you can try if you haven't already:
- Make walls and watchtowers to defend your settlement so enemies can't get to your farmers; you can even put villagers in watchtowers if you need to so enemy axemen can't reach them (and they receive bonus armor against enemy ranged units)
- Use your villagers as your last line of defense, as they are decent fighters against at least the first waves, and even more so with the Militia research; even use all your villagers to defend if you need to (don't let them just stand there and get killed)
- Make sure you research Plough as soon as you have some farms to make sure food production is efficient
- Research Code of Law after making Palace, which increases villager training speed, so you can replenish villagers you lose faster
- Research Apothecary so villagers gain + health and heal faster
- Always make sure you've stockpiled some food befor making additional military units to make sure you afford maintaining them
Apart from that, we thank you for your feedback ! We are working on making sure the game is accessible as possible, and one of the things we need to do is to make sure it's more clear when you're under attack.