Hello, Is propositions welcome for this "old" game? Or this game will not change anymore?

Why do I keep dying in the level Bubble Bobble? I'm just bouncing around and suddenly I die. I can't figure out what the cause is. It usually happens just after I've killed a monster. I'm not touching the lava or anything. What's going on??

If I goldify a room with Idol, does it count towards no death/speedrun achievements and stats? I have an item that looks like a teal cross and I can not use it, what does it actually do? Looks like you can walk over the spikes if you jump on them from left or right, instead of falling on top, is that intentional? Does it matter in terms of achievements if I goldify levels in adventure mode or free play?...

If I use the xbox controller to join any of the game modes two players join in when I press A. But this does not happen if I use the A on the keyboard, meaning that when I do that, only the first player joins. Maybe I'm missing something but it looks like the controller key binding is the same for the keyboard and its pressing "A" on both controller and keyboard at the same time. ...

I’ve got 3 games from this dev now and I love his art and work. But was wondering is this game still fun on its own like his other games or is the focus mostly multiplayer?