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It is not possible to enter your name with the on screen keyboard.
Run the game once, then install .NET 3.5:
$ protontricks 406130 -f -q dotnet35sp1
After this command the game starts. The first start can take a while. Steam tries to install .NET 3.5 every time. To fix this problem, run:
$ protontricks -c "wine reg add 'HKLM\Software\Valve\Steam\Apps\CommonRedist\.NET\3.5' /v '3.5 SP1' /t REG_DWORD /d 1" 406130

.NET 3.5 isn't installed correctly by steam. To fix this issue execute:
$ protontricks 406130 -f -q dotnet35sp1
After this command the game will launch. First time launching can take a while.
Steam tries to install .NET 3.5 every time. To fix this issue execute:
$ protontricks -c "wine reg add 'HKLM\Software\Valve\Steam\Apps\CommonRedist\.NET\3.5' /v '3.5 SP1' /t REG_DWORD /d 1" 406130

.NET 3.5 isn't installed correctly by steam. Do fix this issue execute:
$ protontricks 406130 -f dotnet35sp1
After this command the game will launch, but it takes one or two minutes. Because Steam tries to install .NET 3.5 every time. To fix this issue save the following content to darkmaus.reg
:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\Software\Wow6432Node\Valve\Steam\Apps\CommonRedist\.NET\3.5]
"3.5 SP1"=dword:00000001
Execute the following command:
$ protontricks -c 'wine regedit' 406130
Click Registery
and then Import Registery File...
and choose the location where you saved darkmaus.reg
. After that the game will launch immediately.

- Try to launch "DarkMaus" once
protontricks 406130 xna31
- click through installer; for XNA: click on
Repair
protontricks 406130 -f dotnet35sp1
protontricks -c 'wine regedit' 406130
- go to
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Valve\Steam\Apps\CommonRedist
- create path
.NET/3.5
- inside add new "DWORD Value" with the name "3.5 SP1" and value "1"
- After all that the game will launch
Fails to launch.

Not launching at all, doesn't even show a window. Installs .NET Runtime during first time setup, so that's likely to be the issue