Looks pretty cool.

Looks very nice so far! Reminds me of Atari 2600 games but platform-based instead of top-down view (most Atari platform games were just one single room)

Allright. Tonight I figured out what caused that weird bug with the fireing-in-blocks-kills-you thing.
I noticed that if you shoot a bullet and the instance destroys when it's still within the player's collision box you get hit by the destroyed bullet 65535 times. This is because it is not being checked if the bullet exists before it checks a collision with the player. I fixed it this morning. Now I don't have to check if the player is stuck in a wall and prevent it from fireing inside of a wall anymore since the code is now fixed.

Edit: I might do some work on the projectile code first, but I hope to write some code for bossfights soon. Bosses in Hero Core have weakspots and I'd like to re-use the enemy code for those weakspots, so the weakspots are basically enemies that are placed relative to the boss. The rest of the boss will be indestructible. The bosses in herocore do not have super complex patterns but implementing all of them is going to be tough.

Yeah. It was a game-breaking bug that occured occasionally and it took me some time to figure out what was happening.

New wall tiles. The original game had plain white tiles for walls, but I think given the low resolution I should put more detail into individual tiles. Wall tiles are new.

I spent about 15 minutes teaking the wall texture so it did not look weird when tiled or used as a single block. You can learn this, but it requires a lot of time and patience.

These are not tiles found in the original herocore. As I said the walls in herocore are just plain white blocks, but because of the level design it can represent anything. Sometimes the level looks like a cave and sometimes it looks like a metal structure. Because I do not have large rooms I have to make the tiles suggest which environment the player is in. The rocky tiles are for natural environments including caves.

In herocore you enter a large asteroid with a fortress inside. The fortified room containing the final boss is surrounded by caves, factories and different zones. In these area's you find a boss which give you items upon death which make it easier to progress. Once you arrive at the last boss your chance of survival depends on your skill and the amount of items that you have collected from bosses. (you do not have to defeat them all to get to the last boss, but the boss is easier to defeat with your stats maxed out)

Ui, I like those new wall tiles, nice job on 'em!