I really wanted to like Halfway, I really did. The game has amazing pixel art and a great soundtrack - my favorite since Dustforce's! However, let me bullet point why I feel Halfway is just a "Halfway" done game.
1- The storyline starts off with a cool half-life type premise. Aliens invading from another dimension. And it happens when the ship jumps, its a cool concept. But the game does not tell you anything for 5 hours of play about why this is happening. For me this was just too much investment to learn so little.
2- Combat starts off neat with each character you control having a passive ability and a unique ability to them. The way you increase your power is by equipping better weapons and using stims to increase stats permanently. The problem is that there is a serious lack of variety in weapons...the only thing different between the guns is their range and damage output. This gets boring very quickly as you find out that sniper rifles are the best in every situation due to their long range, ultra high damage, and mid-range magazine. There is no real reason to equip any other gun you get. The same can be said about the armors as well. The game trivializes its own item choices and hampers you with a very small inventory system so that you do not want to keep any other guns around.
3- Repetition of design. This game is a linear story with static level design. There is no randomness about this. Now this is not a flaw by itself, but it becomes a flaw whenever each level is the same as the last for five hours. There is very little character interaction, story developments, and interesting combat challenges that make the levels fun. I had fun for the first two hours as I learned the game. My last three hours have been boring and repetitious. Combat is not very interesting as there is not a lot of elements to engage you to move your troops around. You basically shoot until you hit, not needing to get to better cover or use a weapon at the right time. This made me cry as a tactical gamer.
4- Itembase. After each mission you get to go to the store to buy goods but you can never buy anything worthwhile, just ammo, shield, medikit, and grenade refills. This sucks! The store gives you nothing to look forward to and should be a reward mechanism in the game. This makes the store feel like an after thought...why not just cram extra refills of stuff in each mission and skip the damn store.
TL DR - The storyline, combat, items, and character interaction all suffer from a lot of repetition. I love xcom, the ufo series, jagged alliance, and a lot of other story driven/tactical based games like mass effect..and even indie games that bear a lot of repetition of combat like risk of rain...but this game never does anything interesting with the game foundation it sets up.