Fix README instructions

README.adoc

@@ -53,6 +53,8 @@ Pkg.update()
 
 This step has to be done by running the line above for the first time using the package to install its dependencies. Running the line above after the first time will update the installed dependencies which is optional.
 
+This step has to be done **additionally** after activating an environment in a subdirectory.
+
 === Import the package
 
 You can import the package by running:
@@ -74,14 +76,14 @@ Initialize a simulation with 100 particles having a self-propulsion velocity of
 
 [source,julia]
 ----
-sim_dir = init_sim(100, 40.0)
+sim_dir = init_sim(; n_particles=100, v₀=40.0)
 ----
 
 Run the simulation:
 
 [source,julia]
 ----
-run_sim(sim_dir, duration=20.0)
+run_sim(sim_dir; duration=20.0)
 ----
 
 The values for the number of particles, self-propulsion velocity and simulation duration are used here as an example. For more information about possible values and other optional arguments, see the documentation of `init_sim` or `run_sim`.
@@ -95,7 +97,8 @@ To generate an animation of a simulation, run the following:
 
 [source,julia]
 ----
-using Animation
+include("visualization/Animation.jl")
+using .Animation
 animate(sim_dir)
 ----
 
@@ -107,7 +110,8 @@ To plot only one snapshot of a simulation, run the following:
 
 [source,julia]
 ----
-using SnapshotPlot
+include("visualization/SnapshotPlot.jl")
+using .SnapshotPlot
 plot_snapshot(sim_dir)
 ----
 
@@ -165,7 +169,8 @@ To plot the rewards, activate the environment of the subdirectory `visualization
 
 [source,julia]
 ----
-using RewardsPlot
+include("visualization/RewardsPlot.jl")
+using .RewardsPlot
 plot_rewards(rl_dir)
 ----